About JWT Decoder
Easily decode and inspect your JSON Web Tokens (JWT) without sending them to any server. Our JWT decoder parses the header and payload directly in your browser, ensuring your sensitive authentication tokens remain secure and private.
Features
- Decode JWT header and payload instantly
- 100% client-side processing, tokens never leave your browser
- Beautifully formatted JSON output
- Identifies standard claims (exp, iat, sub, etc.)
Frequently Asked Questions
Is it safe to paste my JWT here?
Yes! Unlike many online decoders, this tool processes everything locally in your browser via JavaScript. No data is sent to a server.
Does this tool verify the signature?
No, this tool only decodes the Base64Url encoded header and payload for inspection. It does not perform cryptographic signature verification.