SSH Key Fingerprint Checker
Paste an SSH public key to compute its modern SHA-256 fingerprint and the legacy MD5 form. Use it to verify host keys, audit authorized_keys entries or check a key someone sent you.
Key facts
- Category
- Security & Privacy
- Price
- Free
- Account
- Not required
- Processing
- In your browser
- Input
- Local files or pasted data
- Platform
- Modern desktop and mobile browsers
What it does
Paste an SSH public key to compute its modern SHA-256 fingerprint and the legacy MD5 form. Use it to verify host keys, audit authorized_keys entries or check a key someone sent you.
Compute SHA-256 and MD5 fingerprints from an SSH public key.
How to use it
Here is the short version of using SSH Key Fingerprint.
- Paste the public key — The full line from authorized_keys or an SSH banner, including the key type.
- Compute — The key blob is decoded and hashed locally.
- Compare — Match the SHA-256 fingerprint character for character with the published value.
Features that matter
What SSH Key Fingerprint does well.
- Nothing leaves your device — The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait — You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas — No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my key safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Can I paste a private key?
No. Never paste a private key into any website. This tool expects the public key line only.
What do the SHA256: and MD5: prefixes mean?
They identify the hash algorithm. SHA-256 is the modern default; MD5 is shown only for compatibility with older documentation.
Open SSH Key Fingerprint Checker
Try it now — it runs in your browser and needs no account.
Open the tool