Free · Verify and read a signed message
JWS Signature Verifier
Check an HS256 compact JWS and reveal its text only after the signature matches.
- Real jose checks
- Private in your browser
- Copy or download the result
Verify message
A successful check proves this input matches this key. You must still trust the key source.
1Add the input
2Check the result
Your checked result will appear hereTry the safe sample if you do not have test data.
Private by design. Keys, secrets, claims, and messages never leave this tab. Do not paste a production private key on a shared device.
Three simple steps
How to use it
- Paste the compact JWS.
- Enter the matching secret.
- Verify before using the message.
Your keys stay on this device
jose and Web Crypto do the work inside this browser tab. Bookify does not upload or save keys, secrets, tokens, or messages. A valid signature proves the input matches the key, but you must still trust where that key came from.