Public Key Fingerprint Calculator

Hash the exact DER bytes behind a PUBLIC KEY PEM and view colon-hex, Base64, and Base64URL fingerprints locally.

Public key (SPKI / PUBLIC KEY PEM)

Hash

Colon-separated hex

Ready

All cryptographic operations run locally in your browser. Keep private keys secret and use production key-management practices for real systems.

How to use this Public Key Fingerprint Calculator

Calculate a SHA-256, SHA-384, or SHA-512 fingerprint from a PEM SubjectPublicKeyInfo public key. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.