PrismKitCrypto & SecurityCertificate DecoderCertificate DecoderRuns in your browserLocalCopy linkMarkdownDecode a PEM certificate or CSR to see its subject, issuer, validity, names, key and fingerprints.Self-Signed Certificate GeneratorCreate a self-signed X.509 certificate and RSA private key for local development and testing.PDF Signature CheckerInspect the digital signatures embedded in a PDF and check whether the file changed after it was signed.