JWT Generator is now live on Tools.Town — a developer tool for generating signed JSON Web Tokens for testing and API development, with support for HS256/RS256 algorithms, standard claim fields, and custom payload properties.
Build test tokens in seconds without writing auth code or digging through JWT library docs.
What Does It Do?
Token Building
Configure the header algorithm, standard claims (sub, iss, exp), and add any custom payload fields.
Signing
Sign with HMAC (HS256, HS384, HS512) using a secret string, or with RSA/ECDSA using a private key.
Expiry Control
Set expiry as a duration (1h, 7d, 30d) or a specific date. The exp claim is set automatically.
For testing only. Never generate tokens containing real credentials or production secrets in a browser-based tool.
How It Works
Set claims
Fill in the subject, issuer, expiry, and any custom payload fields you need.
Add secret
Enter your signing secret (for HMAC) or paste a private key (for RSA/ECDSA).
Copy token
Click Generate and copy the signed JWT, ready to use in Postman, curl, or your test suite.
Why We Built It
Building and testing authenticated APIs requires valid JWTs. Getting one usually means running curl with a secret management service, writing a small script, or asking a teammate. JWT Generator makes test token creation a 30-second browser task — paste into Postman and test immediately.
Try It Now
JWT Generator
Create signed JWTs for development and testing. Configure claims, algorithm, and secret — instant output.
Pair with JWT Decoder to inspect the tokens you generate, and more developer tools.
Related Posts
Frequently Asked Questions
What signing algorithms are supported?
Is this tool safe for production tokens?
Can I set custom claims?
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