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 algorithm, and Subject Alternative Names (SANs). 100% free, instant execution, dark mode supported, and zero registration required on TempoMailUSA.
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Overview & Usage
SSL/TLS Certificate Chain, Expiry & SAN Decoder is a free online tool designed for ssl certificate chain and san checker. Connect live to port 443 of any host to inspect the X.509 SSL/TLS certificate issuer, validity countdown, signature algorithm, and Subject Alternative Names (SANs). 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 | SSL/TLS Certificate Chain, Expiry & SAN Decoder |
|---|---|
| Category | Network, DNS & SSL |
| Processing | Live Network Lookup |
| Privacy | Private — No inputs are saved or tracked |
| Output Formats | Clipboard Copy, Text, and JSON |
How to Use SSL/TLS Certificate Chain, Expiry & SAN Decoder
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.