Token helper
JWT Tool
Create, copy, decode, and verify HS256 JWTs without leaving your browser.
Guide
How to use & features
- Paste a JWT to see its header and payload decoded automatically.
- Enter the shared secret and click “Verify” to check the signature when needed.
- To mint a new token, edit the payload, set a secret, and press “Sign.”
- All signing and verification happen locally, so secrets never leave the browser.
All processing stays inside the browser; nothing is sent anywhere.
Decode a JWT
Provide the secret to verify the signature
Header
Payload