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JWT Decoder
Paste a JWT to decode and view its header, payload, and signature information. Runs locally — your token is never uploaded.
100% Private & Secure
This tool runs in your browser.
Your data is never uploaded or stored.
How to use
- 1
Paste your JWT token.
- 2
The tool decodes header and payload automatically.
- 3
Review the decoded content.
Why use this tool?
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Fast, instant results — no waiting, no page reloads.
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Clean, focused interface designed for developers.
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100% private — everything runs in your browser, nothing is uploaded to any server.
Frequently Asked Questions
Does this tool verify JWT signatures?
No. This tool only decodes the token. It does not verify the signature.
Is my token sent to a server?
No. Decoding happens entirely in your browser. Your token never leaves your device.