KitnSecure/Certificate-decoder

🔒 100% Offline Processing — Zero Server Log

X.509 Certificate & CSR Decoder

Inspect and parse TLS/SSL X.509 certificates and Certificate Signing Requests locally in browser memory. Extracts Subject Alt Names (SANs), Issuer details, validity countdowns, and SHA-256 fingerprints with zero server network transmission.

Raw PEM Certificate or CSR

-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

No Certificate Parsed

Paste a valid PEM certificate or upload a .crt / .csr file to inspect its ASN.1 structure and SANs.

What's Next? Cryptographic Tool Chaining

Your generated secrets are cached in browser RAM. Jump directly to another security sandbox with zero re-entry.

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Compute custom hashes or verify fingerprint digests.