PDF Dark

PDF Dark is a browser-based tool that lets you read and convert PDFs to dark mode instantly, with no uploads, signups, or installations required. Simply drop a PDF file—up to 50 MB—and the entire conversion happens right in your browser via a Web Worker. Your document never leaves your device, ensuring complete privacy. You can start reading the darkened version immediately on a dark background for comfortable viewing, or download the new PDF file to keep. It works seamlessly on mobile devices as well.

Unlike browser extensions that fake a dark theme inside the viewer, PDF Dark produces an actual dark-themed PDF that stays inverted in every reader. The tool rewrites the file with inverted colors, so text and background become a low-light theme while images receive smart per-image handling—photos keep their original colors instead of turning into negatives. This means you can read PDFs in dark mode on Chrome, Firefox, Safari, or Edge, and then carry that dark mode PDF to your phone or e-reader without losing the effect.

PDF Dark offers four distinct themes to choose from before you even drop a file: Midnight, Sepia, Solarized, and OLED pure black. These themes let you see the colors in advance, so you can pick the that best reduces eye strain during late-night reading, extends battery life on OLED phones, or makes code- and text-heavy documents less harsh under bright office lights. After selecting a theme, you can page through the darkened version right in your browser or download the new PDF with your chosen theme baked in.

The conversion is thorough: text stays selectable and searchable, and you have image control with options for Original, Auto, or Invert. This ensures a real dark PDF, not a viewer trick. People use PDF Dark to read at night, study research papers, or share documents that remain comfortable to view on any device. It’s a straightforward way to get a dark mode PDF that works everywhere, without handing your file to anyone.

🎯 Drop a PDF and read it on a dark background right here, or download the darkened file to keep.