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🔐 JWT Generator

Generate HS256 JWTs locally in your browser from payload JSON, optional header extras, and a shared secret.

V1 supports HS256 only and generates JWTs locally in your browser. It does not verify signatures, manage keys, or save token history; your secret and token are not uploaded by default.

The secret is signed exactly as typed. Leading or trailing spaces, newlines, and tabs are not normalized automatically. Because secrets may be multiline, this field uses a multiline editor with concealed-by-default rendering.

Boundary note: this tool generates HS256 tokens only. It does not verify signatures, manage keys, handle JWK/JWKS, parse certificate chains, perform remote debugging, or provide production security guidance.

Privacy note: generation runs locally in your browser by default. Do not paste long-lived production secrets into untrusted devices.

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Free online JWT generator for creating HS256-signed tokens with the browser Web Crypto API. Enter payload JSON, optional header extras, and a shared secret to generate a JWT locally, preview the normalized header and payload, and copy the result with one click. No token or secret is uploaded.