json web token (jwt) decoder
Instantly decode any JSON Web Token (JWT) to inspect header, payload, and expiry claims. No secrets are shared — fully secure and processed in your browser.
Getting Started in Seconds
Paste Your JWT
Enter the encoded JSON Web Token into the input field.
Inspect Parts
The tool automatically splits the token into its Header, Payload, and Signature sections.
Analyze Claims
Review the decoded JSON data to see user IDs, roles, expiration times, and other claims.
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Common
Questions
Have a different question about JSON Web Token (JWT) Decoder? Feel free to reach out or explore our other documentation.
1Ever found yourself staring at an encoded JWT and needing to see exactly which user ID or role is hidden inside?
Imagine you're debugging an authentication issue and your app says 'Access Denied'—our JWT decoder is your digital magnifying glass. It 'unpacks' the base64-encoded token instantly, showing you the human-readable headers and claims like user IDs and expiration times without needing a secret key.
2Think of this as your private, secure workspace for debugging—is it safe to decode my tokens here?
Absolutely. We know that your JWTs may contain sensitive user details or API claims. That's why every bit of the decoding happens 'client-side' directly in your browser. Think of it as reading a secret message in a private, lead-lined room; your token stays on your device and never travels to our servers.
3Does it help me find out why my authentication token is being rejected?
Imagine your login is failing even with a valid token—the 'exp' claim is often the culprit. Our tool clearly highlights the expiration timestamp so you can see at a glance if your session has timed out. It's the ultimate debugging assistant for modern developers working with OpenID Connect or OAuth2.