Veil

Open source PDF dark mode reader that preserves images, charts, and diagrams. Built for night reading of scientific papers and color-critical figures. MIT licensed.

Highlights from the product’s site

• Three layers, one experience
• OCR on images inside your PDFs
• Take it with you

First shown on Hacker News on 26 March 2026 as “Veil – Dark mode PDFs without destroying images, runs in the browser”, where it reached 100 points and 29 comments. Read the discussion.