Dark mode for every PDF you read — online papers, docs, and files off your disk. Built for students, researchers, and developers who live in PDFs after dark. Toggle any PDF in one key, then dial in Darkness and Contrast until the page sits right. Switch to Sepia for long sessions or AMOLED for OLED panels (Pro). • Dark mode on any PDF — online and offline • Darkness + contrast sliders • One-key toggle: Ctrl+Shift+1 (Mac: Cmd+Shift+1) • Keyboard-first, no reload, no re-render