JWT (JSON Web Token) Verifier

Verify the signature of JSON Web Tokens using secret or public keys.

Enter JWT and Key

JWT Token:

Secret or Public Key:

About JWT Verification

JWT verification is the process of checking that a token signature is valid using the appropriate key. This ensures that the token has not been tampered with and was issued by a trusted source.

HMAC algorithms (HS256, HS384, HS512): Use a shared secret key for both signing and verification
RSA algorithms (RS256, RS384, RS512): Use a public key for verification (private key was used for signing)
EC algorithms (ES256, ES384, ES512): Use a public key for verification (private key was used for signing)

Security Note: Always verify JWT signatures in a secure backend environment before trusting their content. Never rely solely on client-side JWT decoding without proper signature verification.