Skip to tool content
JWT Decoder & Creator
Decode, verify, and create JSON Web Tokens. All processing happens in your browser — no data is sent to any server.
Paste or type a JWT above — it decodes in real time.
What is a JSON Web Token (JWT)?
JWT (JSON Web Token) is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. JWTs are commonly used for authentication and authorization in web applications, APIs, and microservices.
A JWT consists of three parts separated by dots: header, payload, and signature. The header specifies the signing algorithm, the payload contains the claims (data), and the signature ensures the token hasn't been tampered with.
Common JWT Claims
iss— Issuer of the tokensub— Subject (usually user ID)aud— Audience (intended recipient)exp— Expiration time (Unix timestamp)iat— Issued at timenbf— Not valid before