Public Key Fingerprint Generator

A fingerprint is a short hash of a public key, used to verify you're connecting to the right server or that a key hasn't changed. When you SSH to a new host, you see its fingerprint and confirm it matches. SHA-256 fingerprints are preferred over MD5 for security.

SSH originally showed MD5 fingerprints (32 hex chars). MD5 is cryptographically broken. SHA-256 fingerprints (64 hex chars) are the modern standard. Use ssh-keygen -l -E sha256 to get SHA-256. This tool generates both for compatibility.

PEM format: -----BEGIN PUBLIC KEY----- with base64 content. SSH format: ssh-rsa or ssh-ed25519 followed by base64. Raw base64 (key data only). The tool detects the format and extracts the key bytes for hashing.