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JWT Encoder

Create signed HS256 JWTs from JSON

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Description

Build and sign JSON Web Tokens (JWT) using HS256 entirely in the browser. Enter header/payload JSON and a secret to produce a compact token.

How to Use

  1. Provide payload JSON.
  2. Set a secret for HS256 signing.
  3. Generate and copy the token.

Example

Example

Payload {"sub":"123"} + secret abc → eyJ…

FAQ

Algorithms?

This tool uses HS256 (HMAC‑SHA256). Other algs are not supported.

Security?

Signing happens locally via Web Crypto; secrets are not sent anywhere.