The latest articles on DEV Community by BrAtUkA_dotdev (@bratukadotdev). https://dev.to/bratukadotdev https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3922789%2F567315f7-da12-465a-8eb5-caf9b8da7299.png https://dev.to/bratukadotdev en BrAtUkA_dotdev Sun, 10 May 2026 04:22:30 +0000 https://dev.to/bratukadotdev/a-gpu-accelerated-pdf-dark-mode-converter-that-runs-entirely-in-your-browser-4610 https://dev.to/bratukadotdev/a-gpu-accelerated-pdf-dark-mode-converter-that-runs-entirely-in-your-browser-4610 <h2> The Problem </h2> <ul> <li>OS dark mode doesn't affect PDF content</li> <li>Existing tools upload your files, are slow, or have few options</li> </ul> <h2> What I Built </h2> <ul> <li>16+ themes, GPU-accelerated, fully offline, zero uploads</li> <li>Link to live tool + screenshot</li> </ul> <h2> How It Works (Technical) </h2> <ul> <li>pdf.js rendering → Canvas API color transform → PDF assembly</li> <li>Parallel page processing</li> <li>Text layer preservation technique</li> <li>Image detection and preservation</li> </ul> <h2> Try It / Contribute </h2> <ul> <li>Live link <a href="https://bratuka.dev/pdf-dark-mode-converter/" rel="noopener noreferrer">https://bratuka.dev/pdf-dark-mode-converter/</a> </li> <li>GitHub link <a href="https://github.com/BrAtUkA/pdf-dark-mode-converter" rel="noopener noreferrer">https://github.com/BrAtUkA/pdf-dark-mode-converter</a> </li> <li>What I'd love help with (performance, suggestions, etc.)</li> </ul> opensource javascript webdev productivity