How this stays private

Lumen Desk is a set of pages. When you drop a file, your browser reads it into memory and a JavaScript library (pdf-lib, PDF.js, or a canvas) changes it. The result is saved with a download. That is the whole path.

There is no API that accepts a document. The waitlist form, if you use it, sends only an email address. Invoice seller details, if you fill them, stay in this browser’s localStorage — we never see them.

Analytics on lumenlabs.works, if enabled, do not include file contents. Cloudflare may see that a page was requested, the way any host sees a page request. They do not see the PDF.

If you want the same promise on a phone camera, use LumenScan.