JSON Web Token (JWT) Decoder
Free ToolDecode and inspect JSON Web Tokens (JWT) in real-time. View header algorithms, payload claims, expiration timestamps, and signature details.
Instant 0ms
100% Client-Side
Encoded JWT Token
100% In-Browser Inspection
Your token is decoded client-side using JavaScript base64 algorithms. No credentials or secrets are transmitted to our servers.
HEADER: Algorithm & Token Type
JOSE Header
PAYLOAD: Data Claims
SIGNATURE
Frequently Asked Questions
Yes, 100%. All decoding happens locally in your browser. The token is never sent across the internet or saved to any server.
A JWT consists of three base64url-encoded parts separated by dots (.): the Header, the Payload (claims), and the Signature.