JWT Decoder

What is a JWT?

JSON Web Tokens (JWT) are an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. They are commonly used for authorization and information exchange.

A JWT consists of three parts separated by dots (.):

• Header: Contains the token type and signing algorithm (e.g., HMAC SHA256 or RSA).
• Payload: Contains the claims (statements about an entity and additional data).
• Signature: Used to verify the message wasn't changed along the way.

Features

• Local Decoding: Instantly decodes the base64url encoded parts of the token.
• Timestamp Parsing: Automatically converts UNIX timestamps for iat (Issued At) and exp (Expiration) to readable dates.

Privacy Note

Never share your JWTs publicly!

Your data is fully secure. This tool decodes your JWT entirely in your web browser using JavaScript. The token is never sent to a server.