JWT Decoder

How to Use JWT Decoder

1. Paste your encoded JSON Web Token (e.g. eyJhbGciOi...).
2. The tool automatically separates the Header, Payload, and Signature.
3. Inspect formatted JSON claims (user ID, roles, permissions).
4. Check token expiration badge (Active vs Expired) with exact human-readable date/time.

Key Features & Advantages

• 100% Client-side decoding — token is NEVER sent over network
• Real-time expiration countdown and validity badge
• Formatted and color-coded JSON header & payload viewer

Frequently Asked Questions