Invert Colors
Convert PDF files to dark mode by inverting colors. Reduce eye strain with high-contrast negative colors using our free and private local processing tool.
Upload PDF File
About This Tool
Invert Colors is a powerful accessibility tool that transforms standard, bright PDF documents into a high-contrast "Dark Mode" version. By reversing the color spectrum, this tool makes white backgrounds black and dark text light, which is ideal for night reading and users with visual sensitivities.
Unlike simple browser extensions, this tool generates a new PDF file with the colors permanently reversed. You can choose to invert everything or apply the effect selectively to text and backgrounds while attempting to preserve the original appearance of photos and diagrams.
Privacy-Focused Conversion: The color inversion happens directly on your CPU via your browser. Your document is never sent to a third-party server, ensuring that your private reading materials stay confidential.
How to Use
Upload Your PDF
Drag and drop your PDF file or click to select the document.
Configure Options
Choose whether to invert all content or preserve images.
Invert and Download
Click Invert to process the document and download the result.
Use Cases
Night Reading
Create dark mode versions of documents for comfortable reading at night.
Reduce Eye Strain
Invert bright documents to reduce eye fatigue during extended reading.
Print Savings
Invert documents to reduce ink usage when printing drafts.
Frequently Asked Questions
Will this make the PDF harder to read?
Inverting colors creates a high-contrast dark mode which most users find much easier on the eyes in dark environments. However, the quality depends on the original document structure.
Can I preserve the original colors of my photos?
Yes, our "Preserve Images" option uses advanced filters to invert the background and text while keeping the colors in your photos as close to the original as possible.
Does this process increase the file size?
Generally, no. Inverting colors is a mathematical change to the color values of the document elements and rarely results in a significantly larger file.