JWT Decoder

Decode JWT tokens to inspect header, payload, and signature. Validate token structure and view claims without verification.

Features

Decode JWT structureView header and payloadValidate token formatClaims inspectionExpiration checkingCopy decoded parts

JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties.

JWTs consist of three parts separated by dots (.): Header.Payload.Signature

• Authentication and authorization

• Secure information transmission

• Single sign-on (SSO)

• API access tokens

• Stateless session management

Never put sensitive information in JWT payload as it can be easily decoded.

Always verify signatures in production environments.

iss: Issuer

sub: Subject

aud: Audience

exp: Expiration time

iat: Issued at