Paste a JSON Web Token (JWT) below to decode and inspect its header and payload. Check expiration, issuer, and all claims instantly. All decoding runs locally — your tokens never leave your machine.
Decode and inspect JSON Web Tokens (JWT) instantly with our free online JWT decoder. Paste any JWT to reveal its header, payload claims, and signature in a clean, readable format — perfect for debugging authentication flows and API integrations.
Simply paste your JWT string into the input field. The tool automatically splits the token and decodes each part: the header shows the signing algorithm, the payload reveals all claims (issuer, expiration, custom data), and the signature is displayed for reference. Each section can be copied individually.
This decoder runs 100% in your browser — your tokens are never transmitted to any server, keeping sensitive authentication data completely private. It's free, requires no signup, and supports all standard JWT formats including HS256, RS256, and ES256.
