JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, and expiry status.
Note: This tool only decodes JWTs client-side. It does NOT verify the signature.
About JWT Decoder Online
Decode and inspect JWT headers, payloads, and signatures client-side. Never send tokens to a server. Free and secure. This page is part of UtilsNest's Developer Tools, so you can move between related workflows without leaving the browser.
How to use it
- Enter or adjust the values, text, or file input needed for JWT Decoder Online.
- Review the generated result instantly and compare outputs until the result fits your use case.
- Copy, download, or continue to a related developer tools workflow if you need the next step.
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Open Developer ToolsFrequently Asked Questions
Is it safe to paste my JWT here?
Decoding runs entirely in your browser with no server upload. However, avoid pasting production tokens from shared or public devices.
Can this tool verify JWT signatures?
This tool decodes (reads) JWTs without verifying the signature. Verification requires the secret key and should be done on your backend.
What is a JWT used for?
JWTs are used for authentication and API authorization. They contain user claims (roles, ID, expiry) in a compact, URL-safe format.