SFTP Host Key Fingerprint Viewer

Retrieve the SSH host key fingerprint of any SFTP server. View key type and both MD5 and SHA256 fingerprints without needing credentials.

What is a host key fingerprint?

Every SSH/SFTP server has a unique host key pair. The fingerprint is a short hash of the public key that you can use to verify you’re connecting to the right server - not an imposter.

SSH clients store host key fingerprints in a known_hosts file. On first connect, they ask you to confirm the fingerprint. On subsequent connects, they verify it automatically. A changed fingerprint is a warning sign of a man-in-the-middle attack or a server rebuild.

SHA256 vs MD5

SHA256 fingerprints (the default in modern OpenSSH) are more secure and collision-resistant. MD5 fingerprints are still shown by some older clients. Both identify the same key.

Verified the fingerprint? An SFTP client that checks host keys on every connect does this for you automatically - FTPie verifies the server's identity each time and warns you if the key changes.