JWT Encoder/Decoder

JSON Web Tokens (JWT) are a secure way to represent claims between two parties. Our tool helps you inspect, decode, and encode JWTs directly in your browser.

How to Use

1. Paste a JWT string into the input box.
2. The header and payload are decoded and displayed in JSON format.
3. Edit values and re‑encode the token if needed.
4. No secret or private keys are stored; HMAC/RS256 signatures require manual validation.

Example

# JWT Example
header: { "alg": "HS256", "typ": "JWT" }
payload: { "sub": "1234567890", "name": "John Doe", "iat": 1516239022 }

encoded:
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...

Best Practices

• Never share your JWT secret keys.
• Use HTTPS to transmit tokens.
• Keep payload data minimal — avoid sensitive information.

Try It Now

Open the live tool here: JWT Encoder/Decoder Tool