Pevlika

CSR Decoder

Check a CSR’s subject, requested hostnames and key before you submit it to a certificate authority.

Runs in your browser — nothing is uploaded

How to use CSR Decoder

  1. Paste one or more PEM blocks starting with -----BEGIN CERTIFICATE----- or -----BEGIN CERTIFICATE REQUEST-----.
  2. Read the subject, SANs, validity dates, key details and extensions.
  3. Copy the SHA-256 fingerprint to compare certificates.
Certificate DecoderDecode PEM SSL/TLS certificates and CSRs: subject, SANs, validity, key and fingerprints. SSL Certificate CheckerCheck a site’s SSL/TLS certificate: validity, expiry date, issuer and chain. Hash GeneratorCreate SHA-256, SHA-512 and other hashes of text or files. Base64 Encode / DecodeEncode text or files to Base64 and decode Base64 back to text.