Free JWT Generator (Test Tokens)

Mint unsigned JWTs for local development and testing in seconds. Edit the header and payload as plain JSON, set expiry with one click, and get a structurally valid token instantly — clearly labeled test-only, since real tokens must be signed by your server.

Test tokens only. Generated tokens are unsigned (alg:none) and must never be used for real authentication. Real tokens must be signed server-side.

Unsigned test JWT


    

    



  
Private by design. This tool runs 100% in your browser — your code is never uploaded to any server.

  

    
How to Use the JWT Generator

    
    
      
  1. Edit the header and payload JSON (add your claims).
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  2. Use Set expiry to add an exp claim 1 hour out.
    3. 
      
  3. Click Generate token — the JWT appears instantly.
    4. 
      
  4. Copy it for use in local tests and API debugging.
    5. 
    

  

  

    
Features

    
Header and payload are edited as real JSON with validation — syntax errors are flagged before generation. The tool Base64url-encodes both parts with correct UTF-8 handling, appends an empty signature segment with alg:none, and shows a live decoded preview so you can confirm the claims. One-click expiry presets (15 min, 1 hour, 1 day) write the exp claim for you.

    
Benefits & Use Cases

    
Developers crafting frontend auth flows generate test tokens without standing up an auth server; QA engineers produce expired versus valid tokens to test both paths; API testers paste tokens into Postman or curl in seconds. Everything is local, so no test credentials transit a network.

    
Tips

    
These tokens are unsigned (alg:none) — most production servers reject them, which is exactly the point: never use this tool for real authentication. Always generate real tokens server-side with a proper signing secret.

  

  

    
Frequently Asked Questions

    
What does “unsigned” mean?
The token’s signature segment is empty and the header declares alg:none. It is structurally a valid JWT, but anyone can forge one — so it proves nothing and must only be used in tests.

    
Can I use these tokens in production?
No — absolutely not. Production tokens must be signed by your server with a secret or private key. Unsigned tokens are rejected by any correctly configured verifier.

    
Why would I want an unsigned token?
For local development: testing how your frontend stores, sends, and decodes tokens, or checking how your API handles malformed versus expired tokens — all without running an auth service.

    
How do I make a signed JWT?
On your server, using a library like jsonwebtoken (Node), PyJWT (Python), or java-jwt — with a strong secret for HS256 or a private key for RS256. Signing must never happen in the browser.

    
Is my payload data uploaded anywhere?
No. Token assembly runs entirely in your browser — your claims never leave your device.

  

  

    
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