JWT Decoder
Encoded JWT
Drop file to load
Processed locally in browser
What is the JWT Decoder?
The JWT Decoder is a free browser-based tool that unpacks JSON Web Tokens (JWTs) into readable JSON format. It instantly splits the token into its three parts (Header, Payload, and Signature) and decodes the Base64Url strings so you can inspect the claims.
Why privacy matters for JWTs
JWTs are typically used for authentication and authorization. Pasting a production JWT into a random online decoder means you are handing over the keys to a user’s session. Since Status202 processes all data locally, your tokens never touch our servers, protecting your users and your application from credential leaks.
How to use this tool
- Paste your encoded JWT (the long string with two periods) into the input field.
- The tool automatically decodes the Header and Payload segments.
- The resulting JSON is formatted and displayed in the output pane instantly.
Frequently Asked Questions
Is it safe to decode my JWT here?▼
Yes! JWTs often contain sensitive session data. Our JWT Decoder parses the token entirely within your browser using JavaScript. No part of your token is ever sent to our servers.
Does this tool verify the signature?▼
No, this tool only decodes the Base64Url encoded segments (Header and Payload) so you can read the contents. It does not cryptographically verify the signature.
What is a JWT?▼
A JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.