JWT Decoder
Decode and inspect JWT tokens.
Processed on your device. Your files never leave your browser.
About JWT Decoder
A JWT (JSON Web Token) has three Base64URL-encoded parts: header, payload and signature. This tool decodes the header and payload so you can inspect the claims, algorithm and expiry — without ever sending the token anywhere.
How to use
- 1Paste your JWT into the input box.
- 2View the decoded header and payload as formatted JSON.
- 3Check readable issued/expiry times and whether the token has expired.
Features
- Decodes header and payload instantly.
- Human-readable exp, iat and nbf timestamps.
- Expiry status indicator.
- Fully client-side — the signature is never verified or sent.
Frequently asked questions
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