About This Tool
The JWT Decoder splits a JSON Web Token into its header, payload, and signature components. View decoded JSON with syntax highlighting, check expiration status, and validate token structure.
How to Use
- Paste your JWT token
- Header and payload decode automatically
- Check expiration status
- Copy individual sections
FAQ
Can this verify JWT signatures?
No. Signature verification requires the secret key or public key, which should never be exposed in a browser.