反转颜色

Upload your PDF and run the inversion in a single operation. White backgrounds turn dark and black text turns light across all pages, instantly producing a dark-themed version you can download for comfortable screen viewing.

Yes. Inverting flips the colors while keeping text crisp, readable, and fully selectable, so the document stays functional. You can still search, highlight, and copy text just as you could before the transformation.

It does. By turning bright white backgrounds dark and light text against them, it produces a comfortable dark-themed PDF that reduces eye strain during late-night reading or long screen sessions in low-light environments.

Yes. A single operation applies the inversion to every page across the entire document, so there's no need to adjust pages one by one. You get a fully dark-themed file ready for screen viewing in seconds.

The tool is free with no signup required. All processing runs locally in your browser, so your PDF is never uploaded anywhere. Your study materials and documents stay confidential on your device.