Developer Tools
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and expiry details without any library.
No token
How to use
- 1Paste your JWT (the full eyJ… string) into the input field.
- 2The header and payload are decoded and displayed as formatted JSON.
- 3Check the expiry time (exp), issued-at (iat), and other standard claims at a glance.
- 4Switch to the Claims tab for annotated descriptions of each field.
- 5Signature verification status is shown — note that private keys are never required or accepted.
Why Use This Tool?
Debugging authentication issues often means inspecting the contents of a JWT without spinning up a dev environment. This tool lets you decode any token instantly and safely, right in the browser — nothing is ever sent to a server.