JWT Generator — Free Online

Create signed JSON Web Tokens with a custom payload and expiry.

How to Use JWT Generator

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JWT Generator — Free Developer Utility

JWT Generator creates signed JSON Web Tokens for testing authentication flows, API development, and debugging. A JWT has three parts: a header describing the signing algorithm, a payload containing claims (user data, expiry, issuer), and a signature that proves the token has not been tampered with. Our generator lets you write custom JSON claims, set a secret key, and choose an expiry window in hours — then computes an HMAC-SHA256 signature and outputs a complete, valid token ready to use in Postman, curl commands, or your application code. This is especially useful when building or testing an authentication system before your backend issues real tokens, or when you need a quick token with specific claims to test authorization logic.

Keywords and Search Terms

Developers searching for this tool use terms like: jwt generator, create jwt token, sign jwt, jwt token creator, generate json web token. Tooliby provides this utility free with no signup, no watermarks, and no data logging.

Privacy — Your Data is Never Stored

Every input you paste into Tooliby developer tools is processed in memory and immediately discarded. We do not log inputs, store results, or analyze your data.

Frequently Asked Questions

No — this tool is for development and testing. Production tokens should be signed server-side with a secret that never leaves your backend infrastructure.

HS256 (HMAC with SHA-256), the most common symmetric signing algorithm for JWTs. The same secret key is used to sign and verify the token.

A short or guessable secret makes the signature trivial to forge. Always use a long, random secret — at least 32 characters — in real applications.

Yes. Enter any valid JSON object as the payload and every field becomes a claim in the token, alongside the automatically added issued-at and expiry timestamps.