SSH public key fingerprint checker
Parse OpenSSH public key lines locally in the browser, calculate SHA-256 fingerprints, and check whether the declared key type matches the binary key blob.
Input is not uploaded, not written to URL state, and not stored. This page does not contact SSH hosts, verify ownership, check authorized_keys options, or process private keys.
Paste one or more public key lines such as ssh-ed25519 AAAA... comment. Private key blocks are rejected before decoding.
Drop an OpenSSH .pub file or authorized_keys text here, or choose it locally. File text is only copied into the input box; it is not uploaded or stored.
| Line | Declared type | Blob type | Family | Blob bytes | Comment | Fingerprint preview | Status |
|---|---|---|---|---|---|---|---|
| Waiting for local analysis | |||||||
Use the fingerprint output for exact manual comparison. Use the complete analysis report for collaboration; it keeps only algorithm shape, buckets, mismatch counts, and boundary statements.
Ready. Analysis runs only in this browser.