View PEM and CRT files
Open certificates in your browser. Free and open source: files are opened on your device and never uploaded.
About PEM and CRT files
X.509 certificates prove who runs a website or signed a file. They come as text (.pem, .crt) or binary (.cer, .der), as chains (.p7b) or with their private key in a PKCS#12 store (.p12, .pfx).
- Subject, issuer, validity, key and extensions of each certificate
- Chains in order, with fingerprints and signature checks
- Certificate requests, revocation lists and PKCS#12 stores
- Private keys only by their type and size, never their content
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