Inspect JWT tokens quickly
View token header and payload in readable JSON while debugging auth flows.
About This Tool
JWT Decoder helps developers inspect token claims, expiry, and issuer values during local development and testing.
Key Features
Decode JWT header and payload
View token claims instantly
Check expiry dates
Identify issuer information
No data sent to server
How to Use This Tool
- Paste a JWT token in the input area.
- The tool decodes header and payload automatically.
- Review claims like exp, sub, and roles.
Why Use This Tool
- Speeds up authentication debugging.
- Makes claims visible without writing scripts.
- Useful during API and frontend auth integration.
Pro Tips
- Never share tokens with untrusted parties
- Check the exp claim for expiry
- Verify issuer with your backend
- This does not validate signatures
Frequently Asked Questions
Does this verify JWT signatures?
No. It decodes only; signature verification is separate.
Can I decode expired tokens?
Yes, decoding works even if token is expired.