JWT Decoder
Decode and inspect JSON Web Token header, payload, and signature instantly.
Documentation
JWT decoding splits the token into header, payload, and signature, then Base64-decodes each part into readable JSON.
Debugging auth flows, inspecting token claims, checking expiration dates, and verifying user roles.
- 1) Paste your JWT token into the input box.
- 2) The header, payload, and signature are decoded instantly.
FAQs
JWT (JSON Web Token) is a compact means of representing claims. It has a header, payload, and signature.
It Base64-decodes the header and payload into readable JSON.
No. This tool only decodes the header and payload. It does not verify the cryptographic signature.
No. All decoding happens locally in your browser. Your tokens are never uploaded or stored.
Yes. The JWT decoder is completely free with no signup or limits.
Last updated: 2026-08-04
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