I built a privacy-first PDF dark mode converter that runs entirely in your browser

TL;DR: I shipped pdfdark.org — a browser-side PDF dark mode converter. Files don't get uploaded; the entire conversion happens in your browser via PDF.js + a Web Worker. Open source (MIT), free, no signup. Why I built this Reading long PDFs at night was killing my eyes. The two paths I had both sucked: Existing "dark mode PDF" web tools → required uploading the file. For research papers, contracts, medical records — that felt sketchy. No way to verify what they did with my data. OS-level "invert