🌗 Invert Colors PDF Client

It flips every color to its opposite on the RGB scale: new = 255 − old. White (255,255,255) becomes black (0,0,0), black becomes white, red becomes cyan, blue becomes yellow. The result is a photographic negative of the document — usually ideal for late-night reading.

Full Invert is the classic 255 − value flip on every RGB channel. Dark Theme does the same flip but adds a subtle blue tint (reduces cool-light eye strain, popular in developer tools). Grayscale Invert first converts to grayscale, then flips — smoother result for photos and shaded diagrams but loses all color information.

Usually no — often the opposite. A normal document is mostly white with some black text; inverting makes it mostly black with white text, which uses far more ink. Inversion is meant for screen reading, not printing. The only case where it saves ink is if you're starting from a dark-background document and want to print a light version.

Yes. This is a literal pixel-level inversion — everything on every page is flipped. Photographs become negatives, logos change color, colored graphs reverse. If you only want to invert the text and leave images alone, no browser-based tool can do that reliably; you'd need a desktop tool like Acrobat Pro.

If you want to read at night and prefer dark backgrounds — use this tool (Full Invert or Dark Theme). If you want to print in black & white or make a color PDF look consistent — use Grayscale PDF. They solve different problems.

No. Everything runs in your browser using pdf.js and pdf-lib. Your file never leaves your device. You can even run this tool offline after the page has loaded once.