JWT Decoder
Inspect JWT headers and payloads without sending tokens away
ABOUT
What is JWT Decoder?
Decode the header and payload of a JSON Web Token and inspect its claims as formatted JSON. The token stays in your browser and its signature is not verified.
This tool decodes the token locally. It does not verify the signature.
ABOUT US
Small tools, built for the web.
Utilities that run entirely in your browser. No install, no signup, and your data never leaves your machine.
FAQ
Questions, answered.
Does this tool verify JWT signatures?＋
No. It only decodes the header and payload for inspection. A decoded token is not proof that its signature is valid.