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JWT Debugger

Decode, inspect, verify, and sign JSON Web Tokens in a fast, local workspace.

Tokens, secrets, and keys stay in your browser and are never sent to a server.

JSON Web Token (JWT)

Valid JWT Currently valid Signature not verified

Decoded header

algSigning algorithm
HS256
typToken type
JWT

Decoded payload

subSubject
1234567890
nameName
John Doe
adminAdministrator privileges
true
iatIssued at
1516239022

History

Valid JWTs stay here, only in this browser.

JWT signature verification

Enter the shared secret used to sign this token.

Signature not verified

Quick guide

How to use JWT Debugger

JWT Debugger is an online tool that helps you Decode, verify, and generate JSON Web Tokens in your browser without sending tokens or keys to a server. Everything lives on a dedicated page, so you can open it again later or share it with a direct link.

This page is linked from the See the full tools index index and from related utilities, which keeps it easy to reach for both users and crawlers. If you need a fast workflow, you can use it immediately without sign-up.

This page keeps readable content, a stable URL, and internal links to other tools on the site. That is the right setup to improve discovery and support long-term organic indexing.

FAQ

What does JWT Debugger do?

JWT Debugger helps you Decode, verify, and generate JSON Web Tokens in your browser without sending tokens or keys to a server. The result is immediate and the tool runs directly in the browser.

Is JWT Debugger free?

Yes. JWT Debugger is available online without payment and without creating an account.

Does JWT Debugger work in the browser?

Yes. JWT Debugger is designed to open from a direct URL and work online with a simple, immediate interface.