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

A privacy-focused PDF dark mode converter, pdfdark.org, runs entirely in the browser, preserving images and charts, and is available for free with no signup or data upload. This tool addresses the issue of existing dark mode PDF tools that require file uploads and OS-level dark mode settings that distort images. The converter uses PDF.js, a Web Worker, and pdf-lib to process PDFs without uploading them. It is open-source and costs $7.50 per year for domain registration. Engineers can use this tool to convert PDFs to dark mode without compromising data privacy.