How do I use the JWT Token Generator?

Edit the header JSON (default is HS256). Set the payload with your claims (sub, name, exp, etc.). Enter a secret key for signing. Use quick templates for common token types. Click Generate JWT to create the signed token.

Is the JWT Token Generator free?

Yes, the JWT Token Generator is completely free. It runs entirely in your browser with no signup, no download, and no data sent to any server.

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JWT Token Generator

Generate JSON Web Tokens for testing. Set header, payload, and secret key. Uses HMAC-SHA256 with Web Crypto API.

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JWT Token Generator

Generate JSON Web Tokens for testing. Set header, payload, and secret — get a signed JWT instantly. Uses HMAC-SHA256 (HS256).

Header (JSON)

Payload (JSON)

Secret Key

Quick Payload Templates

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How to use

How to Use the JWT Token Generator

1 Edit the header JSON (default is HS256).
2 Set the payload with your claims (sub, name, exp, etc.).
3 Enter a secret key for signing.
4 Use quick templates for common token types.
5 Click Generate JWT to create the signed token.

A JSON Web Token (JWT) has three parts: Header (algorithm and type), Payload (claims/data), and Signature (verification). The parts are Base64URL-encoded and joined with dots. This generator uses HMAC-SHA256 via the Web Crypto API for secure client-side signing.

Common JWT claims: "sub" (subject/user ID), "iat" (issued at), "exp" (expiration), "iss" (issuer), "aud" (audience). The "exp" claim is a Unix timestamp — tokens should have short expiration times for security. This tool is for testing and development — never expose production secrets.

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