Invert PDF Colours
Invert page colours for a dark-mode-friendly reading version.
- 100% Private
- No Limits
- Works Offline
or drag and drop here
Invert all colors in your PDF document to create a high-contrast, dark-mode-friendly version. Perfect for late-night reading, reducing eye strain, and saving battery on OLED screens — processed entirely inside your browser.
How to use this tool
- 1
Select your PDF
Choose or drag and drop the PDF file whose colors you want to invert.
- 2
Invert colors instantly
Click Invert PDF Colours to transform white pages and dark text into dark backgrounds with crisp light text.
- 3
Download dark-mode PDF
Save your new inverted PDF immediately with zero data sent to external servers.
Why use this tool
Eye strain relief
Comfortable reading in low-light environments without harsh white glare.
100% private and client-side
Page rasterization and color inversion run exclusively in your browser memory.
OLED power savings
Dark backgrounds significantly lower energy consumption on AMOLED and OLED mobile displays.
Common use cases
Nighttime reading
Read long textbooks, papers, and contracts in bed or dimly lit rooms without straining your eyes.
CAD & diagram inversion
View architectural drawings, schematics, and blueprints in dark blueprint style.
Visual accessibility
Enhance document readability for users with photophobia or contrast sensitivities.
Pro tips
- Inversion converts pure white backgrounds to deep black while preserving image clarity.
- Color diagrams and charts will have their hues complemented (e.g., blue turns amber).
- The resulting PDF retains original page point dimensions and aspect ratios.