Cert Checker – iTrain GmbH

Certificate Checker

Upload · Chain · Crypto · Trust profile

Certificate file(s)

Drop certificates here or choose files (leaf + intermediates)

PEM/CRT/CER/DER/P7B/P12 · max ~2 MB · pure PHP/OpenSSL

Trust / device profile

Hostname to match (optional)

PKCS#12 password (optional)

Try CRL download (CDP) Try OCSP (needs issuer in chain) Auto-fetch chain via AIA (caIssuers)

Best-effort network fetch; multi-cert PEM/P7B/P12 chains are used first.

Or paste certificate PEM

CSR file (optional)

Or paste CSR PEM

Upload a leaf certificate (and intermediates) to check trust, crypto strength, validity and revocation hints.