Certificate Input
Paste your SSL/TLS certificate (PEM format)
Certificate decoding happens entirely in your browser. No data is sent to any server.
How to Use
- Paste your certificate (starts with -----BEGIN CERTIFICATE-----)
- Click "Decode Certificate" to parse it
- View issuer, subject, validity, key info, and extensions
- Click "Use Example Certificate" below to try a sample
Certificate Details
Decoded certificate information
Enter certificate to view decoded information