JWT Encoder & Decoder - JWT Toolbox

JWT encoder and decoder for Chrome. Generate, inspect, re-sign, and verify HS256 JSON Web Tokens locally.

JWT Toolbox is a local JWT encoder, decoder, generator, and verifier for developers working with JSON Web Tokens in Chrome. Decode JWTs, inspect headers and payloads, edit claims, generate new test tokens, re-sign tokens with HS256, and verify HS256 signatures without sending your data to an external service. Key Features: - Encode and generate JSON Web Tokens for development and testing - Decode JWT headers, payloads, and signatures in a readable format - Edit JWT claims and re-encode tokens instantly - Generate unsigned or HS256-signed JWTs - Verify HS256 JWT signatures with a secret - Inspect common claims like exp and iat with readable timestamps - Save reusable tokens locally - Copy or download JWTs for API testing and debugging - Customize the interface with multiple themes Why JWT Toolbox? - Runs locally in your browser - No external JWT decoder or server required - Built for developers, testers, and security engineers - Useful for API debugging, bearer tokens, authentication flows, and JSON Web Token testing - Lightweight, focused, and easy to use Privacy: JWT Toolbox does not collect, transmit, or sell personal data. JWT encoding, decoding, signing, and verification happen locally in your browser. Saved tokens are stored locally only if you choose to save them. JWT secrets are not saved.