JWT Decoder
Decode and inspect JWT tokens online. View header, payload, and signature of any JSON Web Token instantly.
JWT
Paste a JWT token to decode its contents
About JWT Decoder
Our JWT Decoder instantly decodes JSON Web Tokens and displays the header, payload, and signature in a readable format. Debug authentication issues, inspect token expiry, and understand JWT structure without writing any code.
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Your privacy is built in
Everything in JWT Decoder runs locally in your browser — your data never leaves your device and is never uploaded to a server, so nothing you enter is stored or seen by anyone else. No account, no sign-up, no watermark, and completely free.
Frequently asked questions
What is a JWT?
JWT (JSON Web Token) is a compact, URL-safe token format used for authentication and information exchange between parties.
Can I verify JWT signatures here?
This tool decodes the payload for inspection purposes. Signature verification requires the secret key and is best done server-side.
Is it safe to paste my JWT here?
Decoding happens entirely in your browser. However, avoid pasting production tokens with sensitive data into any online tool.