JWT Generator

About this JWT Generator

A JWT generator builds header and payload segments and can sign them for local testing of auth flows. It is useful for mocking tokens in development—not for minting production credentials in a browser casually.

Keys entered here stay in the browser session for client-side signing demos. Prefer proper secrets management and server-side issuance for real systems.

How to use this tool

Set header algorithm and payload claims (sub, exp, custom fields).
Provide a secret or key material only if you understand the risk for that environment.
Generate the token and use it against local APIs.

Common use cases

Local API testing without a full IdP
Reproduce claim shapes for client SDK tests
Learning how header and payload encode

FAQ

Can I use this in production?

Production tokens should be issued by your auth service with HSM/KMS-backed keys—not ad-hoc browser tools.

Which algorithms are appropriate?

Follow your platform guidance (often RS256/ES256 in production). HS256 needs a strong shared secret.

Privacy

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