Online JWT Encoder & Decoder Tool

JSON Web Token parser, encoder and decoder with claims analysis and validation

JWT (JSON Web Token) is a compact, URL-safe means of representing claims between two parties. Parse, encode and decode JWTs instantly.

Parse JWT

Create JWT

Header
Payload
Secret (for signing)

Quick Actions

Comments

Ctrl + Enter to send

No comments yet

Be the first to share your thoughts!

JWT (JSON Web Token) Encoder & Decoder is a fast, privacy-focused online tool to help developers:

  • Decode JWTs into readable header and payload sections

  • Verify token signatures using your secret key (HMAC)

  • Instantly generate new JWT tokens from JSON input

Whether you're debugging authentication flows, testing API tokens, or learning how JWT works — this tool provides a simple and secure way to analyze tokens in your browser. No data is sent to any server.

 Signature verification is performed client-side. Your secrets never leave your browser.

Supports both manual input and sample token generation. Great for developers working with OAuth2, OpenID Connect, Firebase, Auth0, and more.