🔒 Security
SSL/TLS Certificate Inspector
Paste any PEM certificate block to extract issuer, subject, Subject Alternative Names (SANs), validity dates, fingerprint, key algorithm and extensions — entirely in your browser using forge.js. Nothing is sent to any server.
Tip: To get a certificate from a live domain, run:
Then paste the PEM output above.
openssl s_client -connect example.com:443 -servername example.com </dev/null 2>/dev/null | openssl x509 -outform PEMThen paste the PEM output above.
Privacy: All parsing uses the
node-forge library running entirely in your browser. Your certificate data never leaves your device.
📖 How to Use This Tool
▼
1
Paste a PEM block (-----BEGIN CERTIFICATE-----)
2
View subject, issuer, SANs and validity dates
3
Check the expiry countdown bar
4
Use chain navigator for certificate chains
📝 Examples
PEM cert
Input: -----BEGIN CERTIFICATE-----...
Output: CN:example.com Expires:2026-01-01