JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, claims and expiry. All client-side.
Decode a JSON Web Token
Privacy note
Your token is decoded entirely in the browser. Nothing is sent to any server. Still, avoid pasting production tokens into tools you don't control — including this one.
What is a JWT?
A JSON Web Token is a compact, URL-safe way to represent claims between two parties. It has three base64url-encoded parts: header (algorithm), payload (claims), and signature.
Can you verify the signature here?
Not directly — signature verification requires the secret key or public key. This tool focuses on decoding and inspecting the readable parts.
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