JWT Verifier
Verify JWT signatures with secret key or public key validation. Decode header and payload with expiration checking.
How to Use
- 1
Enter JWT
Paste the JWT token you want to verify into the input field.
- 2
Enter secret/key
For HS256/384/512, enter the secret key. For RS256/384/512, enter the public key in PEM format.
- 3
Verify
Click Verify to check the signature and decode the token.
- 4
Review results
See signature validity, decoded header and payload, and expiration status.
JWT verification confirms that a token's signature matches its contents using the original secret or public key. This ensures the token hasn't been tampered with and was issued by a trusted source.
- •Debugging authentication issues
- •Validating tokens during development
- •Testing JWT implementations
- •Verifying third-party tokens