Ferna PDF Reader

PDF reader & annotator: fit-to-width pages, Xodo-style stylus, smooth selection, Sinhala support, reference popups, on-device AI.

Ferna PDF Reader opens PDFs in Chrome with every page, portrait or landscape, fitted to the width of the window. NEW IN 1.4 - Smooth, Xodo-style text selection that selects whole words, even in LaTeX documents - Sinhala support: repairs Sinhala text that other viewers show garbled, for selecting, copying, searching and AI - Sinhala AI: summaries, questions and quizzes in Sinhala - Auto-Bookmark: builds a bookmark tree from the table of contents or the headings, like a human would FEATURES - Zoom (fit width, fit page, percentages) and page rotation from the toolbar or a small menu on the page - Annotations: highlight, underline, strike-out, squiggly, area highlight, pen, marker, text boxes, notes and shapes. The tool panel hides itself as soon as you pick a tool, and a quick popup appears when you select text. - Stylus like Xodo: a pen writes at any time without choosing the Pen tool, with smooth ink and palm rejection - Reference popups: clicking "Figure 3" or "Table 2" shows it in a floating card instead of jumping away - AI assistant that runs on your own computer (WebGPU) or on a local server such as Ollama: summaries, questions about the document, study questions - Password protection (AES-256 / AES-128) and standard PDF annotations that open in every PDF reader PRIVACY No account, no analytics, no tracking. Your PDFs never leave your computer. OPTIONAL FOR WINDOWS The free Ferna save helper (https://tgi25.github.io/ferna-software/) lets Save (Ctrl+S) overwrite PDFs opened from your disk, with no Save window. TIP: to open PDFs stored on your computer, go to chrome://extensions → Ferna PDF Reader → Details and turn on "Allow access to file URLs". SUPPORT FERNA Ferna PDF Reader is free, with no ads and no tracking, and is built and maintained by one developer. If it saves you time and boosts your productivity, you can support its development here: https://buymeacoffee.com/fernasolutions