234+ Live Developer & Privacy Utilities

Free Developer, Email &
Privacy Engineering Tools

Instant DNS/Email deliverability diagnostics (SPF, DKIM, DMARC, BIMI), browser fingerprint & WebRTC leak tests, k-anonymity breach scanners, and zero-knowledge developer utilities.

100% Free Access
19 Live Public APIs
Zero-Knowledge Client Engine
No Login Required

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Email & SMTP Forensics (25)
Zero-Log JS
Email Header Analyzer & Hop Tracer
Parse raw RFC 5322 email headers, trace Received SMTP relay hops with millisecond delays, and verify SPF, DKIM, and...
https://ipwho.is/{ip}
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Live API
SPF Record Checker & Recursive Lookup
Inspect domain SPF TXT records via Google DNS-over-HTTPS, count recursive DNS mechanisms against the RFC 7208 10-lo...
https://dns.google/resolve?n...
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Live API
SPF Record Generator & Include Flattener
Build RFC 7208 compliant v=spf1 DNS TXT policies with authorized IPv4/IPv6 blocks, third-party mail includes, and s...
https://dns.google/resolve?n...
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Live API
DMARC Record Lookup & Syntax Validator
Query _dmarc DNS TXT records in real time, validate p=reject or p=quarantine enforcement, inspect rua/ruf aggregate...
https://dns.google/resolve?n...
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Zero-Log JS
DMARC Policy Generator Wizard
Generate production-ready _dmarc TXT records with custom subdomain policies, strict DKIM/SPF identifier alignment,...
Native RFC 7489 Policy Compi...
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Live API
DKIM Selector Lookup & Public Key Decoder
Discover and verify DKIM _domainkey TXT records, decode base64 RSA/Ed25519 public keys, and audit cryptographic key...
https://dns.google/resolve?n...
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Zero-Log JS
DKIM RSA Key Pair Generator (1024/2048-bit)
Generate 2048-bit RSA private signing keys and formatted DNS _domainkey TXT records directly in your browser with z...
Native WebCrypto RSA-SHA256...
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Live API
BIMI Record & SVG Tiny-PS Validator
Verify default._bimi DNS records, inspect SVG Tiny-PS brand logo URLs, and check Verified Mark Certificate (VMC) au...
https://dns.google/resolve?n...
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Zero-Log JS
BIMI SVG Tiny 1.2 Portable/Secure Sanitizer
Convert standard vector SVG logos into BIMI-compliant SVG Tiny 1.2 Portable/Secure (tiny-ps) format by stripping sc...
Native SVG Tiny-PS XML Sanit...
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Live API
MTA-STS Policy Checker & TLS Validator
Audit RFC 8461 SMTP MTA-STS DNS records and well-known policy files to prevent downgrade and man-in-the-middle atta...
https://dns.google/resolve?n...
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Live API
SMTP TLS-RPT Record Checker & Builder
Validate _smtp._tls DNS TXT records (RFC 8460) and generate JSON/mailto reporting endpoints to monitor TLS negotiat...
https://dns.google/resolve?n...
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Live API
MX Record Priority & Email Provider Detector
Query domain Mail Exchange (MX) records, inspect preference priorities, and automatically fingerprint the underlyin...
https://dns.google/resolve?n...
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Zero-Log JS
HTML Email Responsive Sandbox & Dark Mode Previewer
Preview HTML email templates across Desktop, Mobile, and Forced Dark Mode viewports while auditing unsupported CSS...
Native Client CSS & Dark Mod...
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Zero-Log JS
HTML Email CSS Inliner & Outlook Table Wrapper
Automatically convert <style> block rules into inline style="" attributes so transactional HTML emails render ident...
Native DOM Style Inliner Eng...
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Zero-Log JS
Email Spam Trigger Word & Deliverability Scorer
Scan email subject lines and body copy against 350+ SpamAssassin trigger patterns, CAPS ratios, deceptive links, an...
Native 350+ SpamAssassin Heu...
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Zero-Log JS
Raw EML / MIME Email Viewer & Attachment Extractor
Parse raw .eml source files locally in your browser to inspect plain-text/HTML MIME parts, header metadata, and emb...
Native Zero-Upload MIME Pars...
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Zero-Log JS
MIME Quoted-Printable & Base64 Email Decoder
Decode RFC 2047 encoded email subjects (=?UTF-8?B?...?=), Quoted-Printable (=3D, =20) bodies, and Base64 MIME paylo...
Native RFC 2045/2047 Decoder
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Live API
Corporate Email Permutator & Format Guesser
Generate 32 common corporate email address patterns (first.last, flast, first_l) from a person name and domain whil...
https://dns.google/resolve?n...
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Zero-Log JS
Email Plus-Addressing (+tag) & Dot-Trick Generator
Generate ratusan unique dot-placement variations and +tag sub-addresses for QA signup testing and inbox filter auto...
Native Combinatorial Alias G...
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Live API
Bulk Email Syntax & Disposable Domain Cleaner
Validate email lists in bulk against RFC 5322 syntax rules, disposable burner domain databases, and live DeBounce d...
https://disposable.debounce....
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Zero-Log JS
Mailto HTML Link & Pre-Filled Subject Generator
Create RFC 6068 compliant mailto: anchor links with pre-populated CC, BCC, Subject, and multi-line Body parameters...
Native URL-Encoded Mailto Co...
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Zero-Log JS
Gravatar MD5 / SHA256 Hash & Profile Inspector
Compute normalized lowercase MD5 and SHA-256 Gravatar hashes for any email address and preview the associated publi...
Native MD5/SHA256 + Gravatar...
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Zero-Log JS
SMTP Bounce Error Code & Enhanced Status Analyzer
Decode SMTP 4xx transient and 5xx permanent bounce logs (550 5.1.1, 421 4.7.0, 554 5.7.1) with exact remediation st...
Native RFC 3463 / 5321 Diagn...
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Zero-Log JS
Email Subject Line Pixel Width & Mobile Previewer
Measure exact pixel width and character truncation points of email subject lines and preheader text across iPhone M...
Native Font-Metrics Truncati...
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Zero-Log JS
DMARC Aggregate XML Report (rua) Human Visualizer
Transform raw DMARC aggregate XML feedback reports into readable pass/fail alignment tables showing sending IPs, me...
Native Client XML Feedback P...
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Privacy & Leak Detection (22)
Live API
WebRTC Local & Public IP Leak Test
Test whether your browser leaks your real residential IPv4/IPv6 or local LAN address over WebRTC STUN/ICE candidate...
https://ipwho.is/ + Browser...
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Live API
DNS Leak Test & ISP Resolver Auditor
Verify whether your DNS queries are encrypted through your VPN tunnel or leaking out to your ISP default Autonomous...
https://ipwho.is/ + https://...
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Zero-Log JS
Browser Canvas, WebGL & Audio Fingerprint Auditor
Compute your browser hardware canvas hash, WebGL GPU renderer string, audio oscillator fingerprint, and navigator e...
Native HTML5 Canvas, WebGL &...
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Live API
Email Data Breach & Dark Web Exposure Scanner
Scan any email address against public credential dumps and historical security breaches using the live XposedOrNot...
https://api.xposedornot.com/...
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Live API
Zero-Knowledge Password Leak Checker (HIBP k-Anonymity)
Check if a password has appeared in 850M+ leaked credential records using HaveIBeenPwned k-Anonymity SHA-1 prefix m...
https://api.pwnedpasswords.c...
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Zero-Log JS
Image EXIF, GPS & Camera Metadata Scrubber
Strip hidden EXIF tags, GPS latitude/longitude coordinates, camera serial numbers, and Adobe XMP metadata from JPEG...
Native HTML5 Canvas Zero-Upl...
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Zero-Log JS
Photo EXIF Camera & GPS Coordinates Inspector
Extract embedded camera make/model, shutter speed, ISO, timestamp, and GPS map coordinates from image files without...
Native Binary TIFF/EXIF Head...
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Live API
Anti-Phishing Short URL Expander & Redirect Tracer
Unshorten bit.ly, t.co, tinyurl, and suspicious tracking links safely on our server to reveal every 301/302 hop and...
Native PHP cURL Multi-Hop Tr...
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Zero-Log JS
Bulk URL Tracking Parameter Stripper (utm, fbclid, gclid)
Clean marketing and surveillance parameters (utm_source, fbclid, gclid, mc_cid, _hsenc, igshid, si) from URLs in bu...
Native 250+ Ad-Tracker Sanit...
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Live API
TempoDrop — 10-Minute Encrypted Burner Share
Share sensitive API keys, .env snippets, or confidential text via a 10-minute self-destructing AES-256 encrypted dr...
Native AES-256-CBC Ephemeral...
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Zero-Log JS
PDF Author, Producer & XMP Metadata Sanitizer
Inspect and sanitize /Author, /Creator, /Producer, /CreationDate, and XMP XML packets from PDF documents for anonym...
Native Client PDF Dictionary...
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Zero-Log JS
Zero-Width Character Steganography Detector & Cleaner
Detect and strip invisible zero-width spaces (U+200B, U+200C, U+200D, U+FEFF) used for canary watermarking and text...
Native Unicode Invisible Cod...
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Live API
IDN Homograph & Punycode Phishing Domain Detector
Analyze domains and text for Cyrillic/Greek Unicode lookalike characters (homoglyphs) and convert xn-- Punycode str...
https://dns.google/resolve?n...
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Zero-Log JS
Clipboard MIME Inspector & Hidden HTML Paste Sanitizer
Inspect text/plain, text/html, and hidden CSS/script payloads inside your system clipboard to prevent terminal past...
Native Browser ClipboardData...
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Live API
Tor Exit Node, VPN & Anonymizer IP Checker
Check whether an IPv4 or IPv6 address is an active Tor exit node, open SOCKS proxy, residential VPN, or cloud hosti...
http://ip-api.com/json/{ip}?...
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Zero-Log JS
IPv6 Privacy Extensions & MAC EUI-64 Leak Checker
Check if an IPv6 address embeds your hardware network card MAC address via SLAAC EUI-64 (ff:fe) or uses RFC 4941 te...
Native IPv6 EUI-64 Bitwise D...
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Live API
HTTP Referer & Referrer-Policy Header Leak Tester
Audit how a website configures its Referrer-Policy header and test whether sensitive URL tokens or paths leak to th...
Native Live HTTP Referrer Po...
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Zero-Log JS
Browser Permissions, WebGPU & Hardware Sensor Audit
Audit which browser APIs (Camera, Microphone, Geolocation, Notifications, Clipboard, WebBluetooth, Battery, DeviceM...
Native Navigator Permissions...
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Live API
Cookie Security Flag Auditor (HttpOnly, Secure, SameSite)
Inspect Set-Cookie response headers from any URL or paste raw cookie strings to verify HttpOnly, Secure, SameSite=S...
Native HTTP Set-Cookie Secur...
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Zero-Log JS
Username OSINT Format & Handle Permutator
Generate direct profile verification URLs and handle variations across 30+ developer and social networks (GitHub, G...
Native OSINT Handle & Platfo...
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Zero-Log JS
Wi-Fi QR Code Generator (WPA2/WPA3 Printable Card)
Generate scannable Wi-Fi network QR codes (WPA/WPA2/WPA3/WEP) 100% offline in your browser so guests can connect wi...
Native Client SVG QR Matrix...
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Zero-Log JS
vCard 4.0 Digital Business Card QR Code Generator
Create scannable vCard 3.0/4.0 contact QR codes with name, title, disposable email, phone number, and website compl...
Native Client vCard 4.0 + SV...
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Network, DNS & SSL (28)
Live API
My IP Address, ASN, ISP & VPN Exposure Dashboard
Inspect your public IPv4/IPv6 address, Autonomous System Number (ASN), ISP, geolocation coordinates, reverse DNS PT...
https://ipwho.is/ + http://i...
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Live API
Shodan IP Open Ports & CVE Vulnerability Scanner
Scan any IPv4 address or domain via the official Shodan InternetDB API to discover exposed TCP/UDP ports, CPE servi...
https://internetdb.shodan.io...
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Live API
RDAP Domain Whois & Expiration Countdown
Query the official IANA Registration Data Access Protocol (RDAP) JSON registry for domain creation date, expiry cou...
https://rdap.org/domain/{dom...
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Live API
Passive Subdomain Finder & Host IP Mapper
Discover public subdomains and their mapped IPv4 addresses passively using OSINT DNS intelligence without sending a...
https://api.hackertarget.com...
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Live API
ASN Lookup & BGP CIDR Prefix Explorer
Look up Autonomous System Numbers (ASN) and IP blocks via RIPE NCC RIPEstat to inspect network ownership, abuse con...
https://stat.ripe.net/data/w...
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Live API
Reverse DNS (PTR) & FCrDNS Hostname Verifier
Resolve IPv4/IPv6 addresses to Reverse DNS (PTR) hostnames and verify Forward-Confirmed Reverse DNS (FCrDNS) alignm...
https://api.hackertarget.com...
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Live API
SSL/TLS Certificate Chain, Expiry & SAN Decoder
Connect live to port 443 of any host to inspect the X.509 SSL/TLS certificate issuer, validity countdown, signature...
Native TLS Socket Handshake...
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Live API
DNS CAA Record Checker & Generator
Check Certification Authority Authorization (CAA) DNS records and generate RFC 8659 policies restricting SSL issuan...
https://dns.google/resolve?n...
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Live API
DNSSEC Chain & DS / DNSKEY Record Verifier
Verify DNSSEC cryptographic signing status, Authenticated Data (AD) resolver flags, and DNSKEY/DS records for any d...
https://dns.google/resolve?n...
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Live API
MAC Address Vendor & IEEE OUI Hardware Lookup
Identify the hardware manufacturer, NIC vendor, and country of any MAC address using the live IEEE OUI registry dat...
https://api.maclookup.app/v2...
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Zero-Log JS
MAC Address Randomizer & Local Unicast Generator
Generate valid randomized Unicast Locally Administered MAC addresses (x2:xx:xx:xx:xx:xx) in Colon, Hyphen, or Cisco...
Native IEEE 802Locally Admin...
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Zero-Log JS
IPv4 / IPv6 Subnet Calculator & Visual CIDR Splitter
Calculate network address, broadcast IP, usable host range, wildcard mask, and binary netmask for any IPv4 CIDR blo...
Native 32-Bit / 128-Bit Bitw...
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Zero-Log JS
IP Address Range to Optimal CIDR Block Aggregator
Convert arbitrary start-to-end IPv4 address ranges into the minimal set of contiguous CIDR subnet blocks for firewa...
Native Prefix Aggregation Al...
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Zero-Log JS
IPv6 Address Compressor (RFC 5952) & Full Expander
Convert between abbreviated double-colon (::) IPv6 notation and full 32-hex-digit uncompressed IPv6 addresses. 100%...
Native RFC 5952 Canonical IP...
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Zero-Log JS
IPv4 to IPv6 Mapped (::ffff:) & 6to4 Address Converter
Translate IPv4 addresses into IPv4-mapped IPv6 (::ffff:w.x.y.z), 6to4 (2002::/16), and NAT64 well-known prefix (64:...
Native Dual-Stack Address Tr...
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Zero-Log JS
IP Address to 32-Bit Decimal, Hex & Binary Converter
Convert dotted-quad IPv4 addresses into unsigned 32-bit integers (for MySQL INET_ATON), hexadecimal, octal, and 32-...
Native Network Byte Order Co...
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Live API
HTTP/2, HTTP/3 (QUIC) & ALPN Support Checker
Inspect whether a web server advertises HTTP/3 (h3) over QUIC via Alt-Svc headers and supports HTTP/2 multiplexed f...
Native HTTP Alt-Svc & Protoc...
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Live API
HTTP Response Header & Cache-Control Inspector
Fetch raw HTTP response headers from any URL to debug Cache-Control, ETag, Age, Vary, CDN edge status, and server t...
Native Live cURL Header Insp...
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Live API
Server TTFB (Time To First Byte) & TLS Timing Tester
Measure exact DNS resolution time, TCP handshake latency, SSL/TLS negotiation duration, and Time To First Byte (TTF...
Native cURL Microsecond Sock...
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Live API
DNS SOA (Start of Authority) Serial & TTL Analyzer
Query DNS SOA records and validate primary nameserver, hostmaster email, YYYYMMDDnn serial format, refresh, retry,...
https://dns.google/resolve?n...
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Live API
DNS SRV Record Lookup & Generator (SIP, XMPP, Minecraft)
Look up or construct RFC 2782 DNS SRV service records (_service._proto.name) with priority, weight, port, and targe...
https://dns.google/resolve?n...
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Live API
Cloudflare / CDN Edge Server & WAF Fingerprinter
Identify whether a domain is protected by Cloudflare, AWS CloudFront, Fastly, Akamai, BunnyCDN, or Imperva WAF by i...
Native HTTP Edge Header & CN...
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Zero-Log JS
CSR (Certificate Signing Request) PEM Decoder
Decode PKCS#10 Certificate Signing Request (-----BEGIN CERTIFICATE REQUEST-----) blocks to verify Common Name (CN),...
Native ASN.1 / PKCS#10 CSR I...
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Zero-Log JS
OpenSSL CSR, Private Key & SAN Command Generator
Generate exact one-line OpenSSL CLI commands to create 2048/4096-bit RSA or ECDSA prime256v1 keys, multi-domain SAN...
Native OpenSSL CLI Builder
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Zero-Log JS
X.509 PEM Certificate Structure Decoder (Offline)
Inspect raw -----BEGIN CERTIFICATE----- PEM files locally in your browser to view SHA-256 thumbprints, serial numbe...
Native Client X.509 ASN.1 Pa...
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Zero-Log JS
BIND9 DNS Zone File Generator & Syntax Formatter
Generate complete RFC 1035 BIND9 / Cloudflare importable DNS zone files containing $ORIGIN, $TTL, SOA, NS, A, AAAA,...
Native RFC 1035 Zone Compile...
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Zero-Log JS
Hosts File (/etc/hosts) Formatter, Merger & Deduplicator
Clean, deduplicate, sort, and compress /etc/hosts or C:\Windows\System32\drivers\etc\hosts files while preserving v...
Native Hosts File Lexer & De...
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Live API
Global Postal / Zip Code to Lat-Long Coordinates Lookup
Resolve postal and ZIP codes across 60+ countries into official city names, states/provinces, and GPS latitude/long...
https://api.zippopotam.us/{c...
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Cybersecurity & Crypto (26)
Live API
CVE Vulnerability & CVSS Severity Inspector
Search official CVE vulnerability identifiers via the CIRCL security API to inspect affected software versions, CWE...
https://cve.circl.lu/api/cve...
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Live API
CISA Known Exploited Vulnerabilities (KEV) Explorer
Search the live US CISA Known Exploited Vulnerabilities catalog by vendor, product, or CVE ID to prioritize patchin...
https://www.cisa.gov/sites/d...
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Zero-Log JS
CVSS v3.1 & v4.0 Base Score & Vector String Calculator
Calculate exact CVSS v3.1 base severity scores (0.0 to 10.0 Critical) from Attack Vector, Complexity, Privileges Re...
Native FIRST.org CVSS v3.1 M...
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Live API
HTTP Security Headers Grader (CSP, HSTS, XFO, Referrer)
Audit any website for OWASP-recommended HTTP response headers (Strict-Transport-Security, Content-Security-Policy,...
Native Live HTTP Security He...
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Zero-Log JS
Content Security Policy (CSP) Builder & Unsafe-Inline Evaluator
Build and audit Content-Security-Policy headers, detect dangerous unsafe-inline / unsafe-eval wildcards, and config...
Native W3C CSP Level 3 Polic...
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Zero-Log JS
Subresource Integrity (SRI) SHA-256 / SHA-384 / SHA-512 Generator
Generate W3C Subresource Integrity (integrity="sha384-...") HTML <script> and <link> tags from any JS/CSS code snip...
Native WebCrypto SHA-384 Bas...
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Live API
CORS Header Tester & Access-Control Config Builder
Test live Access-Control-Allow-Origin, Methods, Headers, and Credentials responses on any API endpoint and generate...
Native HTTP CORS Header Insp...
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Zero-Log JS
JWT (JSON Web Token) Debugger, Verifier & HS256 Signer
Decode JWT headers and claims (iss, sub, exp, iat), check token expiration status in real time, and verify or sign...
Native WebCrypto JWT Jose He...
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Zero-Log JS
JWK (JSON Web Key) to PEM Public/Private Key Converter
Convert RFC 7517 JSON Web Key (JWK) objects into standard PKCS#8 / SPKI PEM format and vice versa completely client...
Native WebCrypto SubtleCrypt...
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Zero-Log JS
Bcrypt Password Hash Generator & Cost Factor Verifier
Generate and verify $2y$ / $2b$ Bcrypt password hashes with adjustable work cost factors (rounds 4 to 14) for Larav...
Native Blowfish $2y$ Cryptog...
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Zero-Log JS
Argon2id & PBKDF2 Parameter & Hash Calculator
Calculate optimal OWASP Argon2id memory (m), iterations (t), and parallelism (p) settings or generate PBKDF2-HMAC-S...
Native OWASP Password Storag...
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Zero-Log JS
HMAC-SHA256 / SHA512 Webhook Signature Calculator
Compute keyed-hash message authentication codes (HMAC-SHA256, HMAC-SHA384, HMAC-SHA512) in Hex and Base64 to debug...
Native WebCrypto HMAC Hex &...
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Zero-Log JS
AES-256-GCM Client-Side Text Encryptor & Decryptor
Encrypt and decrypt sensitive text, JSON payloads, or recovery seeds in your browser using authenticated AES-256-GC...
Native WebCrypto AES-256-GCM...
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Zero-Log JS
RSA 2048 / 4096-Bit Public & Private Key Pair Generator
Generate PKCS#8 Private Key and SPKI Public Key PEM pairs (2048-bit or 4096-bit) directly inside your browser using...
Native WebCrypto RSA-OAEP Ke...
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Zero-Log JS
SSH Ed25519 & RSA ssh-keygen Command & Key Builder
Generate hardened ssh-keygen CLI commands (Ed25519 with 100 KDF rounds) and inspect SSH public key SHA-256 / MD5 co...
Native OpenSSH Key & Fingerp...
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Zero-Log JS
TOTP 2FA Authenticator Code Generator (RFC 6238)
Generate live 6-digit Time-Based One-Time Password (TOTP) 2FA codes and otpauth:// QR codes from Base32 secret keys...
Native RFC 6238 HMAC-SHA1 30...
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Zero-Log JS
EFF Diceware Passphrase & Entropy Calculator
Generate memorable, high-entropy 5-to-10-word cryptographic passphrases using `window.crypto.getRandomValues()` wit...
Native CSPRNG EFF Wordlist E...
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Zero-Log JS
Password Shannon Entropy & Brute-Force Crack Time Estimator
Calculate exact pool entropy ($L \times \log_2(R)$), Shannon information entropy, and offline RTX-4090 / ASIC clust...
Native Character-Pool & Patt...
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Zero-Log JS
API Secret, Bearer Token & Laravel APP_KEY Generator
Generate cryptographically random 256-bit API secrets, prefixed Bearer tokens (`sk_live_...`), Hex keys, and Larave...
Native CSPRNG 256-Bit Token...
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Zero-Log JS
UUID v1, v4, v7 (Time-Ordered) & ULID Bulk Generator
Generate and decode database-friendly time-ordered UUID v7 (RFC 9562), lexicographically sortable ULIDs, and random...
Native RFC 9562 UUIDv7 & ULI...
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Zero-Log JS
NanoID Generator & Birthday Collision Probability Calculator
Generate URL-safe NanoID strings with custom alphabets and calculate the exact number of IDs/hour required for a 1%...
Native Custom-Alphabet CSPRN...
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Live API
RFC 9116 security.txt Generator & Live Validator
Inspect a domain's live `/.well-known/security.txt` file or generate an RFC 9116 compliant vulnerability disclosure...
Native /.well-known/security...
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Zero-Log JS
HTTP Permissions-Policy (Feature-Policy) Header Builder
Generate strict HTTP `Permissions-Policy` headers disabling unauthorized access to `camera=()`, `microphone=()`, `g...
Native W3C Permissions-Polic...
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Live API
HSTS (Strict-Transport-Security) Preload Eligibility Checker
Verify if a domain serves a valid `Strict-Transport-Security` header meeting Chromium HSTS Preload list requirement...
Native HTTPS HSTS Header Ins...
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Zero-Log JS
HTPasswd (.htpasswd) Bcrypt & APR1-MD5 Line Generator
Generate `.htpasswd` authentication lines using Bcrypt (`$2y$`) or SHA-1 (`{SHA}`) alongside ready-to-use Nginx `au...
Native Apache/Nginx Basic Au...
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Zero-Log JS
Client-Side File & Text Checksum Calculator (SHA-256/512/MD5)
Compute cryptographic SHA-256, SHA-384, SHA-512, and SHA-1 digests for any text or local file in your browser to ve...
Native WebCrypto SHA-1 / SHA...
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FinTech QA & Test Data (18)
Live API
Credit & Debit Card BIN / IIN Live Bank Checker
Look up any 6-to-8 digit Bank Identification Number (BIN / IIN) via live banking metadata APIs to identify the card...
https://data.handyapi.com/bi...
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Zero-Log JS
Luhn Algorithm (MOD-10) Checksum Validator & Digit Calculator
Validate credit card numbers, IMEI numbers, and National Provider Identifiers against the Luhn MOD-10 formula with...
Native ISO/IEC 7812 Luhn Ste...
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Live API
Global Fake Persona & QA Identity Profile Generator
Generate realistic QA user identities complete with localized street addresses, disposable `@trashmail.in` email ad...
https://randomuser.me/api/?n...
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Zero-Log JS
IBAN (International Bank Account Number) MOD-97 Validator
Validate IBAN strings across 80+ SEPA and international countries by verifying country length rules, bank/branch so...
Native ISO 13616 MOD-97-10 V...
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Zero-Log JS
SEPA Test IBAN Generator for FinTech QA Sandboxes
Generate mathematically valid, checksum-verified dummy IBAN numbers for UK, Germany, France, Netherlands, Spain, an...
Native ISO 13616 Checksum Co...
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Zero-Log JS
SWIFT / BIC Code Structure Parser & Country Inspector
Parse 8-character and 11-character SWIFT/BIC banking codes into Institution Code, ISO 3166 Country Code, Location/T...
Native ISO 9362 BIC8/BIC11 L...
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Zero-Log JS
Stripe, PayPal, Razorpay & Adyen Sandbox Test Cards Hub
Copy official test credit card numbers, 3D Secure 2.0 challenge triggers, insufficient funds cards, and CVC fail to...
Native Interactive FinTech S...
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Zero-Log JS
Mock JSON Dataset & REST API Payload Generator
Generate realistic JSON arrays of users, e-commerce orders, transactions, and IoT telemetry records for frontend pr...
Native Deterministic Schema...
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Zero-Log JS
SQL INSERT & Laravel Seeder Dummy Data Generator
Generate ready-to-run MySQL/PostgreSQL `INSERT INTO` batch statements and Laravel `DB::table()->insert()` seed arra...
Native Multi-Dialect SQL See...
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Zero-Log JS
CSV Bulk Test File Generator (Up to 5,000 Rows)
Generate and download clean CSV or TSV spreadsheets populated with realistic test customers, SKUs, and timestamps t...
Native High-Speed CSV Stream...
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Live API
Valid Postal Code & Street Test Address Generator
Generate real city, state, postal code, and latitude/longitude combinations for US, UK, Canada, Germany, and Austra...
https://api.zippopotam.us/{c...
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Zero-Log JS
E.164 International Phone Number Formatter & Validator
Normalize local phone numbers into strict ITU-T E.164 international format (`+14155552671`), detect country calling...
Native ITU-T E.164 Parser +...
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Zero-Log JS
SVG Placeholder Image & Base64 Data-URI Generator
Generate lightweight, zero-HTTP-request SVG placeholder images and inline `data:image/svg+xml` URIs with custom dim...
Native Zero-Request SVG Bann...
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Zero-Log JS
Exact Byte-Size Dummy File Generator (PDF, PNG, ZIP, JSON)
Generate and download test files of exact byte/kilobyte/megabyte sizes with valid magic-byte headers to test upload...
Native Browser Blob & ArrayB...
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Zero-Log JS
IMEI Number Luhn Checksum Validator & TAC Inspector
Validate 15-digit mobile device IMEI numbers, extract the 8-digit Type Allocation Code (TAC) and 6-digit serial num...
Native 3GPP TS 23.003 IMEI A...
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Zero-Log JS
ISBN-10 / ISBN-13 & EAN-13 Checksum Calculator
Validate ISBN-10, ISBN-13, and EAN-13 retail barcodes, calculate missing check digits, and convert ISBN-10 numbers...
Native ISO 2108 / GS1 Modulo...
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Zero-Log JS
Bulk UTM Campaign Link Builder & Query Sanitizer
Build clean, lowercase, URL-encoded Google Analytics 4 (GA4) UTM tracking links (`utm_source`, `utm_medium`, `utm_c...
Native URLSearchParams Campa...
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Live API
SaaS Purchasing Power Parity (PPP) Global Pricing Calculator
Calculate localized SaaS subscription pricing and fair PPP coupon discounts across 30+ countries using live USD for...
https://open.er-api.com/v6/l...
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API & Backend Dev (24)
Zero-Log JS
cURL Command to Fetch, Axios, Python, PHP & Go Converter
Convert complex `curl -X POST -H ... -d ...` terminal commands into clean JavaScript `fetch()`, Axios, Python `requ...
Native cURL Flag Tokenizer &...
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Zero-Log JS
HAR (HTTP Archive) Waterfall & Slow Request Analyzer
Paste or drop a browser DevTools `.har` JSON log to inspect HTTP status codes, slow TTFB bottlenecks, payload sizes...
Native Client HAR 1.2 JSON T...
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Zero-Log JS
JSON to TypeScript Interface & Zod Validation Schema Generator
Infer strict TypeScript `interface` definitions and runtime `z.object({...})` Zod validation schemas directly from...
Native Type-Inference AST Co...
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Zero-Log JS
JSON to PHP Array, Laravel Migration & Eloquent Model Generator
Convert JSON objects into modern PHP `[]` short-array syntax, Laravel Eloquent `$fillable` + `casts()` methods, and...
Native Laravel 11/13 Code Sy...
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Zero-Log JS
JSON Schema Draft-07 / 2020-12 Generator & Validator
Generate complete `$schema` Draft 2020-12 definitions with `required` arrays and property type constraints from any...
Native JSON Schema Draft 202...
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Zero-Log JS
JSONPath & Dot-Notation Expression Interactive Evaluator
Query deeply nested JSON structures using dot-notation and array filter paths (`data.items[*].email`) with instant...
Native JSON Tree Query Evalu...
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Zero-Log JS
GraphQL Query Beautifier & Schema Type Inspector
Format, prettify, and minify GraphQL queries, mutations, fragments, and SDL schema definitions while extracting ope...
Native GraphQL Lexer & Inden...
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Zero-Log JS
OpenAPI 3.0 / Swagger YAML-to-JSON Validator & Endpoint Table
Parse OpenAPI 3.0 / Swagger specifications to inspect REST paths, HTTP methods, summary descriptions, and security...
Native OpenAPI 3.0 Spec Pars...
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Live API
NPM Package Size, Dependencies & Maintainer Auditor
Inspect any NPM package live from the official NPM Registry API to audit its latest version, unpacked bundle size,...
https://registry.npmjs.org/{...
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Zero-Log JS
SemVer (`^`, `~`, `>=`) Range & Version Bump Calculator
Test how `package.json` and `composer.json` caret (`^1.2.3`), tilde (`~1.2.3`), and wildcard constraints resolve up...
Native Semantic Versioning 2...
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Zero-Log JS
Webhook Payload Inspector & Stripe/GitHub Signature Verifier
Generate and verify `Stripe-Signature` (`t=...,v1=...`), GitHub `X-Hub-Signature-256` (`sha256=...`), and Slack sig...
Native Webhook HMAC-SHA256 V...
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Zero-Log JS
HTTP Status Codes (1xx–5xx) Interactive Developer Reference
Look up any HTTP response status code (100 to 511, plus Cloudflare 520–527 codes) to see its RFC 9110 specification...
Native RFC 9110 Status Code...
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Zero-Log JS
API Rate Limit (Token Bucket, Leaky Bucket & Retry-After) Calculator
Calculate burst capacity, sustained RPS (requests per second), Redis sliding-window memory footprint, and `X-RateLi...
Native Rate-Limiting & Burst...
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Zero-Log JS
Protocol Buffers (Protobuf) Raw Wire Hex Decoder
Decode raw hexadecimal or Base64 Protocol Buffer payloads into field numbers, wire types (Varint, 64-bit, Length-de...
Native Varint & Length-Delim...
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Zero-Log JS
gRPC Status Code (0–16) to HTTP Status Mapping Debugger
Translate gRPC status codes (`0 OK`, `3 INVALID_ARGUMENT`, `7 PERMISSION_DENIED`, `8 RESOURCE_EXHAUSTED`, `14 UNAVA...
Native gRPC Core Status Diag...
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Zero-Log JS
WebSocket (wss://) Live Frame & Handshake Debugger
Test `wss://` WebSocket endpoints directly from your browser, measure connection handshake latency, send JSON frame...
Native Browser WebSocket Cli...
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Zero-Log JS
Server-Sent Events (EventSource) Stream Debugger & Parser
Parse raw `text/event-stream` (`event:`, `data:`, `id:`, `retry:`) chunks including OpenAI/Claude streaming SSE del...
Native SSE Text/Event-Stream...
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Zero-Log JS
URL Component Parser & Query String to JSON Editor
Deconstruct any complex URL into protocol, host, port, pathname, hash, and a live editable JSON dictionary of decod...
Native WHATWG URL & URLSearc...
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Zero-Log JS
OAuth 2.0 PKCE (code_verifier & S256 code_challenge) Generator
Generate RFC 7636 compliant high-entropy `code_verifier` strings (43–128 chars) and their corresponding `S256` Base...
Native RFC 7636 SHA-256 Base...
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Zero-Log JS
SAML 2.0 AuthnRequest & Response Base64/Deflate Decoder
Decode SAML 2.0 `SAMLRequest` and `SAMLResponse` SSO payloads from Base64 and URL-encoding into formatted XML to de...
Native SAML XML & Base64 Ins...
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Zero-Log JS
LDAP Search Filter Validator & Distinguished Name (DN) Parser
Validate RFC 4515 LDAP search filters (`(&(objectClass=user)(mail=*))`), check balanced parentheses, and parse Dist...
Native RFC 4515 LDAP Filter...
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Zero-Log JS
CORS Access-Control Preflight & Origin Mismatch Simulator
Simulate browser CORS decisions by comparing Request Origin, Method, Credentials mode, and Custom Headers against s...
Native W3C CORS Preflight Ru...
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Zero-Log JS
Postman Collection v2.1 JSON to cURL & Fetch Converter
Extract all endpoints from a Postman Collection v2.1 JSON export and convert every request into ready-to-copy `curl...
Native Postman v2.1 Schema E...
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Zero-Log JS
.env File Validator, Duplicate Key Checker & .env.example Generator
Scan `.env` configuration files for duplicate keys, unquoted spaces, and syntax errors while automatically strippin...
Native Dotenv Lexer & Secret...
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DevOps, Linux & Cloud (20)
Zero-Log JS
Crontab Expression Generator & Next 10 Execution Dates
Translate 5-field cron expressions (`*/5 * * * *`) into plain English descriptions and calculate the exact next 10...
Native POSIX 5-Field Cron Pa...
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Zero-Log JS
Linux chmod Octal (755) & Symbolic (rwxr-xr-x) Calculator
Convert between octal file modes (`0755`, `0644`, `4755`) and symbolic permission strings (`-rwxr-xr-x`) with SetUI...
Native POSIX Permission Bitm...
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Zero-Log JS
docker run Command to docker-compose.yml v3.8 Converter
Transform long `docker run -d -p -v -e --restart` CLI commands into clean, production-ready `docker-compose.yml` se...
Native Docker CLI Flag-to-YA...
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Zero-Log JS
Dockerfile Multi-Stage & Security Best-Practices Linter
Audit Dockerfiles for root user execution, unpinned `:latest` tags, missing `apt-get clean`, exposed secrets in `EN...
Native Hadolint-Style CIS Do...
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Zero-Log JS
Nginx Server Block (Reverse Proxy, SSL, Laravel/Node) Generator
Generate hardened Nginx `server {}` configurations for Laravel PHP-FPM (`try_files $uri /index.php`) or Node.js Rev...
Native Nginx HTTP/2 + TLS 1....
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Zero-Log JS
Apache .htaccess 301 Redirect, HTTPS & Caching Rule Builder
Generate cPanel/Apache `.htaccess` files enforcing HTTPS, non-www to www (or vice versa), directory index protectio...
Native Apache mod_rewrite &...
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Zero-Log JS
Linux Systemd Service Unit File (.service) Generator
Generate `/etc/systemd/system/*.service` unit files for Laravel Queue Workers (`php artisan queue:work`), Node apps...
Native Systemd Unit & Harden...
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Zero-Log JS
UFW & iptables Linux Firewall Rule Command Builder
Build copy-pasteable `ufw` and `iptables` firewall provisioning scripts locking down SSH rate limits, HTTP/HTTPS po...
Native Netfilter / UFW Rule...
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Zero-Log JS
SSH ~/.ssh/config Jump Host (ProxyJump) & Alias Builder
Generate structured `~/.ssh/config` blocks with `ProxyJump` bastion routing, `IdentityFile` pinning, `ServerAliveIn...
Native OpenSSH Client Config...
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Zero-Log JS
Git Command Finder & Interactive Undo / Rebase Builder
Find the exact safe Git command to undo the last commit without losing changes (`reset --soft HEAD~1`), squash comm...
Native Git Workflow Recipe E...
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Zero-Log JS
.gitignore Multi-Stack Template Builder (Laravel, Node, Python)
Compile comprehensive `.gitignore` files combining rules for Laravel, Composer, Node.js, Vite, Python, macOS (`.DS_...
Native Multi-Framework Gitig...
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Zero-Log JS
Kubernetes Deployment, Service & Ingress YAML Generator
Generate Kubernetes `Deployment`, `Service`, and `Ingress` YAML manifests while converting CPU millicores (`500m`)...
Native Kubernetes Manifest &...
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Zero-Log JS
AWS IAM Policy JSON Linter & Wildcard Privilege Auditor
Validate AWS IAM Policy JSON documents, flag dangerous `"Action": "*"` or `"Resource": "*"` privilege escalation ri...
Native AWS IAM Least-Privile...
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Zero-Log JS
Cloudflare Bulk Redirect CSV & _redirects File Generator
Convert lists of source and target URLs into Cloudflare Bulk Redirect List CSV format and Cloudflare Pages `_redire...
Native Cloudflare Pages / Bu...
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Zero-Log JS
WireGuard wg0.conf Key Pair & Peer Tunnel Config Generator
Generate complete `[Interface]` and `[Peer]` WireGuard VPN configurations (`wg0.conf`) with 256-bit Base64 private/...
Native Curve25519 Base64 Wir...
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Zero-Log JS
Nginx & Apache Access Log Parser & Status Aggregator
Parse raw Nginx and Apache access log lines to extract top requesting IPs, HTTP 4xx/5xx error spikes, suspicious sc...
Native Combined Log Format (...
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Zero-Log JS
RAID 0 / 1 / 5 / 6 / 10 Usable Capacity & Fault Tolerance Calculator
Calculate usable storage capacity in TB/TiB, parity overhead, fault tolerance drive failures, and read/write speed...
Native Storage Parity & Stri...
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Zero-Log JS
File Transfer Time & Cloud CDN Egress Cost Calculator
Calculate exact transfer duration for large backups across 100Mbps/1Gbps/10Gbps links and compare monthly egress co...
Native Throughput & Cloud Eg...
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Zero-Log JS
SLA Uptime Percentage (99.9% to 99.999%) Downtime Calculator
Convert any SLA availability percentage (`99.5%`, `99.9%`, `99.95%`, `99.99%`, `99.999%`) into exact allowed downti...
Native High-Availability SLA...
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Zero-Log JS
Unix Epoch Timestamp, ISO-8601 & Discord <t:> Tag Converter
Convert Unix epoch timestamps (seconds or milliseconds) to UTC, local timezone, ISO-8601, RFC 2822, and copyable Di...
Native Second/Millisecond Ep...
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Data & Code Converters (30)
Zero-Log JS
JSON Formatter, Validator, Tree Viewer & Trailing-Comma Fixer
Format, validate, and minify JSON payloads while automatically repairing common syntax errors like trailing commas,...
Native Fault-Tolerant JSON P...
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Zero-Log JS
Nested JSON to CSV / Excel TSV Bidirectional Converter
Flatten nested JSON object arrays into RFC 4180 CSV or tab-separated Excel TSV tables—or convert CSV rows back into...
Native Flat-Key JSON-to-CSV...
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Zero-Log JS
YAML to JSON & TOML Configuration Bidirectional Converter
Convert between Kubernetes/Docker YAML manifests, JSON objects, and Rust/Cloudflare `wrangler.toml` configuration s...
Native YAML/JSON/TOML Config...
→
Zero-Log JS
XML Formatter, XPath Evaluator & XML-to-JSON Converter
Beautify minified XML documents, extract attributes and text nodes into clean JSON objects, and test XPath expressi...
Native DOMParser XML-to-JSON...
→
Zero-Log JS
SQL Query Beautifier & Dialect Formatter (MySQL / PostgreSQL)
Format compact, unreadable SQL queries with uppercase keywords, aligned `SELECT` columns, indented `LEFT JOIN` clau...
Native SQL Keyword & Clause...
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Zero-Log JS
CSV / TSV to GitHub Markdown Table & HTML Table Converter
Convert comma-separated or Excel copy-pasted TSV data into neatly padded GitHub Flavored Markdown (`|---|---|`) tab...
Native Aligned GFM Markdown...
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Zero-Log JS
Base64 & Base64URL (RFC 4648) String Encoder & Decoder
Encode and decode standard Base64 and URL-safe Base64URL (`-` and `_` without `=` padding) strings with full UTF-8...
Native UTF-8 Safe Base64 & B...
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Zero-Log JS
Base32 (RFC 4648) & Base58 (Bitcoin/Solana) Encoder & Decoder
Encode and decode text or hex strings into RFC 4648 Base32 (used in TOTP 2FA secrets) and Bitcoin/IPFS Base58 (omit...
Native Base32 & Bitcoin Base...
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Zero-Log JS
URL Percent-Encoder (encodeURIComponent) & Recursive Decoder
Encode and recursively decode URLs and query parameters (`%20`, `%3A`, `%2F`) comparing `encodeURI()` vs `encodeURI...
Native RFC 3986 Percent-Enco...
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Zero-Log JS
HTML Entities Named (&amp;) & Numeric (&#x) Encoder/Decoder
Convert special HTML characters (`<`, `>`, `&`, `"`, `'`) into named entities (`&lt;`), decimal (`&#60;`), or hexad...
Native W3C Named & Hex Entit...
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Zero-Log JS
Hexadecimal, Binary, Octal & ASCII Byte String Converter
Convert between ASCII/UTF-8 text, space-separated Hexadecimal byte dumps (`54 65 6d 70 6f`), 8-bit Binary strings (...
Native Multi-Radix Byte Dump...
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Zero-Log JS
Unicode Code Point (U+), UTF-8 Byte Length & Grapheme Inspector
Inspect every character in a string to view its Unicode code point (`U+XXXX`), UTF-8 hex byte sequence, UTF-16 surr...
Native UTF-8 / UTF-16 Code U...
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Zero-Log JS
Punycode (xn--) to Unicode Internationalized Domain Converter
Convert internationalized Unicode domain names (`münchen.de`, `پاکستان.pk`) into ASCII-Compatible Encoding (`xn--mn...
Native RFC 3492 Bootstring P...
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Zero-Log JS
Semantic JSON Diff & Key-Order Agnostic Comparator
Compare two JSON payloads semantically—ignoring whitespace and key ordering—to highlight added, removed, and modifi...
Native Recursive Object Tree...
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Zero-Log JS
Side-by-Side Code & Text Unified Patch (git diff) Checker
Compare two text or source code blocks line-by-line to generate color-coded additions (`+`), deletions (`-`), and u...
Native Myers Longest-Common-...
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Zero-Log JS
Regular Expression (RegEx) Live Tester & Match Group Visualizer
Test regular expressions against multi-line sample text with real-time match highlighting, numbered/named capture g...
Native RegExp Capture Group...
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Zero-Log JS
Glob Pattern (**/*.js) & File Path Matcher Tester
Test shell, `.gitignore`, and Webpack/Vite glob patterns (`src/**/*.{ts,tsx}`, `!**/node_modules/**`) against lists...
Native Glob-to-RegExp Path C...
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Zero-Log JS
Developer Identifier Case Converter (camelCase, snake_case, kebab-case)
Convert variable names, database columns, and titles simultaneously into `camelCase`, `PascalCase`, `snake_case`, `...
Native Lexical Word-Boundary...
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Zero-Log JS
Bulk SEO URL Slugify & Unicode Transliteration Generator
Convert article headlines or tool titles in bulk into clean, lowercase, kebab-case SEO URL slugs with optional stop...
Native ASCII Transliteration...
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Zero-Log JS
Line Deduplicator, Alphabetical Sorter & SQL IN() Quote Wrapper
Remove duplicate lines (case-sensitive or insensitive), trim whitespace, sort A–Z or by length, and wrap items in q...
Native Set Deduplication & L...
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Zero-Log JS
String Escape & Unescape Tool (JSON, SQL, Regex, HTML, PHP)
Escape or unescape backslashes, double/single quotes, newlines (`\n`), and special control characters for JSON lite...
Native Multi-Language String...
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Zero-Log JS
Safe PHP serialize() / unserialize() Inspector & JSON Converter
Safely parse PHP `serialize()` strings (`a:3:{s:4:"name";...}`) into readable JSON objects and PHP array syntax in...
Native Zero-Eval PHP Seriali...
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Zero-Log JS
IEEE 754 Floating-Point (32-Bit Single / 64-Bit Double) Visualizer
Visualize the exact Sign bit, Exponent bits, Mantissa/Fraction bits, and hexadecimal representation of any number i...
Native DataView Float32/Floa...
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Zero-Log JS
64-Bit Bitwise Operations (AND, OR, XOR, NOT, Shift) Calculator
Perform bitwise `AND (&)`, `OR (|)`, `XOR (^)`, `NOT (~)`, Left Shift (`<<`), and Right Shift (`>>`) on Decimal, He...
Native BigInt 64-Bit Bitwise...
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Zero-Log JS
Arbitrary Number Base & Radix Converter (Base 2 to Base 62)
Convert large integers seamlessly between Binary (Base 2), Octal (Base 8), Decimal (Base 10), Hexadecimal (Base 16)...
Native BigInt Base-2 to Base...
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Zero-Log JS
Storage Unit Converter (Bytes, KB, MB, GB, TB vs KiB, MiB, GiB, TiB)
Convert digital storage sizes between SI decimal units (`KB = 1,000 B`, `GB`) and IEC binary units (`KiB = 1,024 B`...
Native SI Decimal (1000) vs...
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Zero-Log JS
GitHub Flavored Markdown (GFM) to Semantic HTML Converter
Convert Markdown documentation into clean semantic HTML (`<h1>`, `<table>`, `<pre><code>`, `<blockquote>`) with a s...
Native GFM Markdown Parser &...
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Zero-Log JS
HTML Snippet to Clean Markdown Article Extractor
Convert raw HTML articles, headings, links, lists, and code blocks into clean, LLM-ready Markdown text while stripp...
Native DOM-to-Markdown Seria...
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Zero-Log JS
JavaScript KeyboardEvent (event.key / event.code) & ASCII Table
Press any key on your keyboard or search the full 0–127 ASCII table to inspect `event.key`, `event.code`, `event.wh...
Native Live Keyboard Listene...
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Zero-Log JS
Gzip & Deflate Compression Ratio & Transfer Size Estimator
Measure the exact uncompressed UTF-8 byte size vs real Gzip and Deflate compressed byte size of any JSON, HTML, CSS...
Native Browser CompressionSt...
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Technical SEO & AEO (12)
Zero-Log JS
Schema.org JSON-LD Generator (SoftwareApplication, FAQPage, HowTo)
Generate combined `@graph` Schema.org JSON-LD markup (`SoftwareApplication`, `FAQPage`, `HowTo`, `BreadcrumbList`,...
Native Schema.org @graph JSO...
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Live API
OpenGraph, Twitter/X Card & Discord Embed Live Inspector
Fetch `og:title`, `og:description`, `og:image`, and `twitter:card` tags from any live URL and preview how the link...
Native Live Meta Tag Fetcher...
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Live API
robots.txt Validator & AI Bot (GPTBot, ClaudeBot, PerplexityBot) Builder
Inspect any site's live `/robots.txt` file and generate fine-grained crawler rules to allow AI Search citation bots...
Native Live robots.txt Fetch...
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Zero-Log JS
Google SERP Pixel-Width Simulator & AI Overview Snippet Optimizer
Measure exact pixel width (max `580px` Title, `960px` Description) of your SEO meta tags and format a 55-word direc...
Native Arial 20px / 14px Pix...
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Zero-Log JS
Hreflang Multi-Language <link> & XML Sitemap Tag Generator
Generate bidirectional `<link rel="alternate" hreflang="..." />` HTML head tags and `xhtml:link` XML sitemap annota...
Native ISO 639-1 / ISO 3166-...
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Live API
301 / 302 Redirect Chain Tracer & Canonical Link Auditor
Trace HTTP 301, 302, 307, and 308 redirect chains up to 6 hops, detect redirect loops, and verify that the final st...
Native Multi-Hop HTTP Redire...
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Zero-Log JS
Keyword Density, TF-IDF & 2/3-Word N-Gram Phrase Analyzer
Analyze article or landing page copy to extract 1-word, 2-word (bigram), and 3-word (trigram) keyword frequencies,...
Native Lexical N-Gram & Stop...
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Live API
XML Sitemap Validator & Bulk URL List Extractor
Fetch any live `sitemap.xml` URL or paste XML sitemap markup to extract all `<loc>` URLs, inspect `<lastmod>` dates...
Native Live XML Sitemap Fetc...
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Zero-Log JS
PWA site.webmanifest & Apple Touch Icon Tag Generator
Generate complete `site.webmanifest` / `manifest.json` files and `<head>` theme-color / Apple iOS meta tags for ins...
Native W3C Web App Manifest...
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Live API
IAB ads.txt & app-ads.txt Syntax Validator & Deduplicator
Fetch a domain's live `/ads.txt` file or paste `ads.txt` lines to validate publisher IDs (`google.com, pub-..., DIR...
Native IAB Tech Lab ads.txt...
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Live API
HTML Heading (H1–H6) Semantic Outline & Hierarchy Extractor
Fetch any live webpage URL (including competitor pages!) to extract its complete `<h1>` through `<h6>` heading tree...
Native Live DOM H1–H6 Tree I...
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Zero-Log JS
Core Web Vitals Zero-CLS Image & Ad Slot Aspect-Ratio Calculator
Calculate greatest-common-divisor aspect ratios (`16 / 9`, `4 / 3`), explicit `width`/`height` HTML attributes, and...
Native Intrinsic Size & CSS...
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Frontend UI & SVG (10)
Zero-Log JS
WCAG 2.1 AA/AAA & APCA Color Contrast Ratio Checker
Calculate exact WCAG 2.1 contrast ratios (`1:1` to `21:1`) and modern APCA perceptual lightness contrast (`Lc`) for...
Native W3C Relative Luminanc...
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Zero-Log JS
OKLCH, HSL, RGB & Tailwind v4 50–950 Color Scale Generator
Convert any Hex or RGB brand color into perceptual `oklch()`, `hsl()`, and a complete 11-stop (`50` through `950`)...
Native Perceptual OKLCH/HSL/...
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Zero-Log JS
SVG Path Minifier & HTML / Laravel Blade / JSX Component Converter
Strip editor bloat (`xmlns:xlink`, Adobe/Figma comments, empty groups) from SVG icons and convert attributes (`stro...
Native SVG XML Optimizer & J...
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Zero-Log JS
SVG to CSS background-image Data-URI Encoder (URL & Base64)
Encode raw `<svg>` markup into compact URL-escaped `background-image: url("data:image/svg+xml,...")` CSS rules (30%...
Native Minimal-Escape UTF-8...
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Zero-Log JS
CSS clamp() Fluid Typography & Responsive Spacing Calculator
Calculate exact `clamp(min, val + vw, max)` CSS declarations that scale font sizes or padding smoothly between mobi...
Native Linear Viewport Inter...
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Zero-Log JS
CSS cubic-bezier() & Spring Physics Easing Curve Generator
Generate snappy, hardware-accelerated CSS `transition-timing-function: cubic-bezier(...)` curves (Apple Spring, Lin...
Native Bezier Control-Point...
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Zero-Log JS
HTML, CSS & JavaScript Inline Minifier & Byte-Savings Calculator
Minify HTML templates, CSS stylesheets, and JavaScript snippets in one click while measuring exact character and pe...
Native Lexical Whitespace &...
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Zero-Log JS
Client-Side PNG / JPG to WebP Compressor (Zero Server Upload)
Convert and compress PNG/JPEG images into high-performance WebP format directly inside your browser with adjustable...
Native HTML5 Canvas toDataUR...
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Zero-Log JS
Base64 Data-URI to Image Previewer, Dimension Inspector & Downloader
Paste any `data:image/...;base64,...` or raw Base64 string to render the image preview, inspect exact pixel dimensi...
Native Base64 Binary MIME &...
→
Zero-Log JS
Layered CSS Box-Shadow & Hairline Surface Token Generator
Generate realistic multi-layered CSS `box-shadow` tokens and Tailwind arbitrary shadow classes (`shadow-[...]`) wit...
Native Multi-Layer Ambient &...
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Core Email & AI Utilities
Popular
Disposable Email Verifier
Verify if an email address or domain is disposable, temporary, or burner in real time.
110,000+ Domains
→
Live
Domain Compatibility Checker
Test if temporary mail domains bypass filters on ChatGPT, Netflix, Discord, and Steam.
Pass/Fail Matrix
→
Encrypted
Self-Destructing Burn Note
Send encrypted self-destructing private notes that wipe automatically after being read once.
Zero Server Logs
→
AI Email Generator
Write professional, high-converting outreach and follow-up emails in seconds.
Instant Generation
→
AI Reply Generator
Generate smart, contextual email replies automatically for support and business.
Free Access
→
AI Phishing Detector
Analyze suspicious emails, fake security alerts, and fraudulent links for phishing.
Security Scanner
→
Fake Credit Card Generator
Generate Luhn-valid dummy Visa, Mastercard, and Amex test card numbers for QA sandbox testing.
QA Sandbox
→
Domain & IP Blacklist Checker
Scan your domain or mail server IP against real-time DNSBL spam blacklists.
50+ DNSBLs
→
Email Regex Validator
Test and debug RFC 5322 regular expressions for email address validation.
RFC 5322
→
Random User-Agent Generator
Generate realistic desktop, mobile, and bot User-Agent strings for browser testing.
Chrome / iOS / Bot
→
Embeddable Temp Mail Widget
Embed a disposable temporary email inbox directly on your website with one snippet.
HTML Embed
→
Website SEO Audit Tool
Audit on-page meta tags, headings, structured data, and technical SEO health.
On-Page SEO
→
Writing, AI & AEO Utilities
Popular
AI Text Humanizer
Convert robotic AI drafts into natural, human-grade writing with clean cadence.
Instant Humanize
→
AI Rewriter
Rewrite paragraphs and articles instantly with improved clarity and flow.
Instant Rewrite
→
AI Proofreader & Grammar Checker
Fix grammar, spelling, punctuation, and sentence structure issues cleanly.
Smart Check
→
AEO Optimization Audit
Optimize content for Answer Engines (Perplexity, ChatGPT Search, Google AI Overviews).
AI Search SEO
→
LLM System Prompt Generator
Create structured system prompts and instructions for Claude, ChatGPT, and Gemini.
Prompt Engineering
→
Online Scam & Fraud Checker
Verify whether a suspicious website, domain, or message is a scam or phishing trap.
Fraud Check
→
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