JWT Decoder Online Free — Inspect Token Claims

What is a JWT Decoder?

A JWT (JSON Web Token) decoder parses the three base64url-encoded parts of a JWT — header, payload, and signature — and displays them as readable JSON. This is essential for debugging authentication issues and inspecting token claims like expiration, user ID, and roles.

How to Decode a JWT Online

Paste your JWT token into the input field. The header and payload are decoded and displayed instantly. Expiration times are shown as human-readable dates so you can immediately see if a token has expired.

Why Use This Free JWT Decoder?

JWT decoding is a client-side operation — your token is never sent to a server. Everything runs in your browser, which means your credentials and session tokens remain completely private. No registration required.