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Craft signed JWTs locally — pairs with our decoder for testing.
🔑 Test-only tool: HS* secrets live client-side here, never ship them in front-end code. For RS256/ES256 use a server-side library — asymmetric signing needs the private key kept private.
Perfect for debugging auth flows: mint a token with known claims, hand it to your API in a test request, and inspect what your middleware extracts. Pair with our JWT Decoder to see exactly what a server will read back.
HS256/384/512 are symmetric — the same secret signs and verifies. That is why this tool works fully client-side: the secret stays in your browser via WebCrypto. RS256/ES256 need a private key and belong in server-side code.
Always set exp (expiry) on real tokens; add iss (issuer) and aud (audience) when multiple services share tokens. The iat timestamp is pre-filled to now for you.
A signing key embedded in front-end JavaScript is public the moment you deploy. Use this generator with throwaway test secrets only.
The JWT Generator creates jwt generator on demand, right in your browser. Set the options you need, click generate, and the result is ready to copy. Because everything runs locally, nothing you enter or produce leaves your device.
Generators like this are useful when you need a specific output (a password, a UUID, a QR code, placeholder text) and don't want to install an app or trust an unknown website with your data. This tool is free, has no usage limits, and works the same on phone and desktop.
Common uses: people reach for this tool when they need to use a generate jwt for testing, hs256 jwt example with secret, create json web token online free, or jwt debug create sign verify.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
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