JWT Decoder

Decode JSON Web Tokens and inspect their header, payload, algorithm, issued-at and expiry times in a readable, color-coded view. Tokens are parsed locally and never sent anywhere.

100% free No uploads Runs in your browser No signup

JWT decoder

JSON Web Token

Paste a JWT — it is decoded locally, never sent anywhere

This tool decodes and inspects tokens only — it cannot verify signatures (that requires the secret key). Tokens are parsed entirely in your browser, so debugging sensitive JWTs is safe here.

How to use the JWT Decoder

1
Open the tool above — it is already running, no install or account needed.
2
Enter your input and adjust the options to match what you need.
3
Copy or download the result — everything was processed locally in your browser.

Private by design

This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.

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