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 matching without transmitting your password. 100% free, instant execution, dark mode supported, and zero registration required on TempoMailUSA.
Password Leak Checker
Your browser computes the SHA-1 hash of the password locally. It then sends only the first 5 characters of that hash. The server responds with all matching hash endings, and your browser matches the rest offline. Your password never leaves your device.
Ready to Check
Enter a password above to verify against 850M+ known breached credentials.
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Overview & Usage
Zero-Knowledge Password Leak Checker (HIBP k-Anonymity) is a free online tool designed for k-anonymity password breach checker. Check if a password has appeared in 850M+ leaked credential records using HaveIBeenPwned k-Anonymity SHA-1 prefix matching without transmitting your password. It runs quickly and privately in your browser with instant copy and export options.
This tool runs with complete privacy in your browser. All inputs, calculations, and DNS verifications follow current web standards.
Technical Specifications
| Tool Name | Zero-Knowledge Password Leak Checker (HIBP k-Anonymity) |
|---|---|
| Category | Privacy & Leak Detection |
| Processing | Live Network Lookup |
| Privacy | Private — No inputs are saved or tracked |
| Output Formats | Clipboard Copy, Text, and JSON |
How to Use Zero-Knowledge Password Leak Checker (HIBP k-Anonymity)
Enter your domain, IP address, text, or code into the input field above, or click one of the quick sample presets.
Click the button to query the network in real time and retrieve up-to-date DNS and protocol records.
Inspect the generated code, formatted results, and diagnostic details in the results panel.
Click the Copy button to copy the output directly to your clipboard, or download it to your computer.