Private Everything runs in your browser. No uploads, no tracking, no signup./ zero data collected
Tools / 02 · JWT Debugger
JWT Debugger
Decode the header and payload of a JWT. Unlike most online decoders, your token is never sent to a server.
—
Signature verification is not performed — only header and payload are decoded (they are plain base64url).
Get the weekly dev toolkit
New tools, privacy tips, and small-batch discounts. No spam, unsubscribe anytime.