A free PDF reader for your browser, with every page fitted to your window, a Xodo-style stylus, smooth text selection, proper Sinhala support and a private AI assistant that runs on your own computer.
Works in Chrome · Brave · Edge · Firefox — no account, no ads, no tracking.
If it saves you time and boosts your productivity, you can support its development here.
Designed for students, researchers and anyone who spends their day with PDFs.
Portrait or landscape, each page fills the width of the window, so mixed documents are easy to read.
Selection snaps to whole words, even in two-column LaTeX papers. A quick popup lets you highlight, underline, copy or ask the AI about the selected text in one tap.
Many PDF viewers show Sinhala text as garbled characters. Ferna PDF Reader repairs it, so you can select, copy, search and use the AI in Sinhala.
An AI assistant that runs on your own computer, or on a local server you choose. Your documents are never sent to the cloud.
Highlights, underline, strike-out, area highlight, pen, marker, notes, text boxes and shapes. The tool panel hides itself once you pick a tool. Annotations are saved as standard PDF annotations that open in every PDF reader.
A pen writes at any time without choosing the Pen tool, with smooth ink and palm rejection.
Builds a bookmark tree from the table of contents or the headings, like a person would.
Click “Figure 3” or “Table 2” and it pops up in a floating card instead of jumping away.
Ctrl+S saves straight over the file you opened (with the free Windows save helper).
Add or remove a password with standard AES-256 / AES-128 PDF encryption.
Chrome, Brave, Edge and Firefox, with the same features everywhere.
Free for everyone. Available now on the Chrome Web Store and Firefox Browser Add-ons.
Install from the Chrome Web Store. Works in Google Chrome, Brave and Microsoft Edge.
Add to Chrome – freeLets Save (Ctrl+S) overwrite PDFs opened from your disk, with no Save window.
Download save helperTip: to open PDFs stored on your computer in Chrome, open Extensions → Ferna PDF Reader → Details and turn on Allow access to file URLs.
Ferna PDF Reader does not collect, store or transmit any personal data or usage data. PDFs and annotations are processed entirely on your computer.
The extension connects to the internet only to:
Settings are stored locally in your browser. There are no analytics, no ads and no tracking.
Contact: tgi.fernando@gmail.com
Also available as a separate page: Privacy Policy.
A coffee keeps new features coming. Thank you for your support!