Inspect a JSON Web Token
A JWT usually has Header, Payload, and Signature sections. Decoding the first two does not verify the signature or make the token trustworthy.
LOCAL CTF TOOL
JWT Decoder
Parse JWT headers and payloads locally to learn authentication structures and inspect token clues.
INPUT ·
LOCAL ONLY
OUTPUT
Privacy first
Input is processed in your current browser. The current version does not upload your text to a server.
Common questions
How does this tool work?
The transformation runs in your browser.