🔐JWT Decoder
Decode and inspect JSON Web Tokens (JWT)
The token will be decoded automatically as you type
Error
📋 Header
📦 Payload
⚠️ Token is expired
✓ Token is valid
🔒 Signature
⚠️ Note: Signature verification requires the secret key and is not performed in the browser for security reasons.
Features
- ✓ Decode JWT tokens instantly in your browser
- ✓ View header, payload, and signature separately
- ✓ Check token expiration status
- ✓ Human-readable timestamp formatting
- ⚠️ Client-side only - your tokens never leave your browser
FAQ
Can I validate expiration quickly?
Yes. The tool highlights whether the token is expired based on the exp claim.
Do my tokens leave the browser?
No. This decoder runs in your browser only.