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JWT Generator — Create an Unsigned or HMAC-Signed Token

Build a JWT by entering your own header and payload claims, then sign it with an HMAC secret (HS256) to produce a real, verifiable token — useful for generating test tokens for local development and API testing without standing up an auth server.

How to use JWT Generator

1. Enter your payload claims (sub, exp, custom fields).
2. Enter your HMAC secret.
3. Generate the signed token.
4. Copy it for use in your test requests.

Frequently asked questions

Is this safe for production tokens?

For local testing and development, yes. For production, generate tokens server-side where the signing secret never reaches a client or browser at all.

Which algorithms are supported?

HMAC-based signing (HS256) is supported, covering the most common case for test/dev tokens. RSA-signed (RS256) tokens need a private key pair rather than a shared secret.

Can I set an expiry claim?

Yes — set the exp claim to a Unix timestamp, and any verifier checking expiry will reject the token once that time passes.

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Also searched for: generate jwt token online · create hs256 jwt for testing · jwt builder with custom claims

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