Décodeur JWT

JWT Decoder parses and displays the contents of JSON Web Tokens without needing the secret key. View the header (algorithm, type) and payload (claims, expiration) instantly.

Features

• Auto-decode on paste
• Header and payload display
• Human-readable dates for exp/iat
• Token expiration check
• Pretty-printed JSON output

Usage Example

// JWT Structure
header.payload.signature

// Header: {"alg":"HS256","typ":"JWT"}
// Payload: {"sub":"1234","exp":1700000000}