JWT Verifier
Verify JWT signatures with secret key or public key validation. Decode header and payload with expiration checking.
Learn More About JWT
Want to understand how JWT tokens work? Check out our comprehensive guide covering JWT structure, security, and best practices.
Read the complete JWT guide →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