Decode JSON Web Tokens instantly. No signup, no tracking, no ads.
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. It consists of three parts separated by dots: header.payload.signature. The header identifies the signing algorithm, the payload contains the claims (data), and the signature verifies the token hasn't been tampered with.
⚠️ Security note: This tool runs entirely in your browser. No data is sent to any server. Never paste sensitive tokens into public tools.