How to Use SSL Certificate Viewer
1
Input Cert: Paste your PEM certificate text or click Browse File (.crt, .pem, .cer).
2
Decode: Click Decode Certificate to parse the X.509 structure locally in your browser.
3
Inspect: Check validity status, Subject/Issuer details, Public Key specs, and SAN entries.
4
Fingerprints: Verify SHA-256 and SHA-1 certificate fingerprints directly for security checks.

Upload or Paste Certificate

Validity Remaining

Subject Details (Issued To)

Issuer Details (Issued By)

Validity Dates

Valid From
Valid Until

Technical Info

Serial Number
Signature Algorithm
Public Key

Subject Alternative Names (SAN)

Fingerprints

SHA-256 Fingerprint
SHA-1 Fingerprint