./return_to_tools

JWT Decoder

Inspect header and payload; expiry countdown (no signature verify).

Runs entirely in your browser. No data sent to any server.

Decodes header and payload only. Does not verify signatures.

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "MMT",
  "iat": 1516239022
}