Invert PDF Colors for Dark Mode

Why read PDFs in dark mode

Most PDFs are black text on a white page, which is harsh in a dark room and on large bright monitors. Your phone and computer may already be in dark mode, but PDF viewers usually still show a glowing white page. Inverting the colors turns the page dark and the text light, which many people find far easier on the eyes at night.

How inversion works

Every page is rendered and its colors are inverted: white becomes black, black becomes white, and other colors flip to their opposites. The whole page is inverted, including photos and diagrams, which is why inverted copies are best for reading text rather than viewing images. The inversion applies to every page, and you can check the preview before exporting.

What to know about the exported file

• Pages are re-rendered as inverted images, so text in the exported copy is no longer selectable or searchable.
• Keep the original for printing and editing; use the inverted copy for reading.
• Running the tool again on the inverted copy flips the colors back.
• To invert only part of a document, extract those pages first and merge them back afterwards.

Private processing

Inversion runs entirely in your browser; the PDF is not uploaded to a server. Very long documents take longer on older devices because each page is rendered locally.

Other ways to make PDFs easier to read

If full inversion is too strong, a sepia background from PDF Background Color is gentler. To read a document without changing it at all, open it in the online PDF Reader.