SSL Cert (PEM)

PEM format validation + DER size (full ASN.1 decode in backlog)

PEM input

✓ Valid PEM (CERTIFICATE)

Full ASN.1 decode requires OpenSSL or a heavier library:

Full parse: openssl x509 -in cert.pem -text -noout

v0: PEM format validation + DER size only. Full X.509 ASN.1 decode (issuer/SAN/validity) requires OpenSSL or pkijs/forge libraries.

Verify outputs before using in production. No warranty — see Terms.