🔑JWT Generator

Generate JSON Web Tokens with custom headers and payload claims.

Note: This tool generates unsigned JWTs for testing only. Do not use in production — real JWTs require server-side signing.

Header

Payload

Generated JWT

ewogICJhbGciOiAiSFMyNTYiLAogICJ0eXAiOiAiSldUIgp9.ewogICJzdWIiOiAiMTIzNDU2Nzg5MCIsCiAgIm5hbWUiOiAiSm9obiBEb2UiLAogICJpYXQiOiAxNzc1Mzk5Njg5LAogICJleHAiOiAxNzc1NDAzMjg5Cn0.c2lnbmF0dXJlX3BsYWNlaG9sZGVy

About JWT Generator

Generate JSON Web Tokens (JWTs) with custom header and payload for testing and development purposes. Edit the header algorithm and payload claims directly in JSON, then see the resulting base64url-encoded token. Note: tokens generated here use a placeholder signature and are for testing only.

How to Use JWT Generator

1
Edit the header
Modify the algorithm (alg) and type (typ) in the header JSON if needed.
2
Edit the payload
Add or modify claims in the payload JSON, including expiration (exp) and subject (sub).
3
Copy the JWT
The token updates in real time — copy it for use in testing tools like Postman.

Common Use Cases

Testing JWT decoding and parsing in your application
Generating test tokens for API development
Learning JWT structure and claim formats
Building JWT-based authentication flow mockups

Frequently Asked Questions

Are the generated JWTs valid for authentication?

No, these JWTs use a placeholder signature and are not cryptographically signed. For real authentication, use a proper JWT library with your secret key on the server side.

What claims can I add to the payload?

You can add any standard claims (sub, iss, exp, iat, aud) or custom claims in the JSON payload editor.