PDF Dark Mode is a free Chrome extension designed to improve the readability of PDF documents by applying a dark mode theme. This tool is specifically optimized for PDFs that have predominantly white backgrounds, allowing users to switch their viewing experience with just one click. By transforming bright backgrounds into soothing dark tones, it aims to reduce eye strain and enhance focus during reading sessions.

The extension is compatible with all PDF viewers within Chrome, making it easy to integrate into existing workflows. Key benefits include improved battery life on OLED screens, reduced eye fatigue, and better concentration on text. Users can quickly activate dark mode by installing the extension, opening a PDF, and clicking the extension icon. While it is effective for most documents, results may vary for PDFs with darker backgrounds or complex color schemes.