ScaleWhite Tools

PEM / Certificate Decoder

Decode PEM certificates and display their information.

What is this tool?

Decode X.509 certificates in PEM format and display information such as subject, issuer, and validity period. Useful for verifying SSL/TLS certificates.

How to use

  1. Paste a PEM certificate (text starting with -----BEGIN CERTIFICATE-----) into the input field.
  2. Click the Decode button.
  3. Certificate field information will be displayed.

Examples

  • Check the expiration date of SSL/TLS certificates.
  • Verify the issuer (CA) of a certificate.
  • Inspect each certificate in a certificate chain.