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Certificate Decoder

Decode and analyze SSL/TLS certificates. View detailed information about certificate fields, validate certificate chains, and verify signatures.

How to Use

  1. Choose between single certificate or certificate chain mode
  2. Paste your PEM-encoded certificate(s) in the text area
  3. Click "Decode Certificate" to view detailed certificate information

Input

Paste a single PEM-encoded certificate

Output

Enter a certificate to decode and view its details