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Polar – free and open source cross-platform software for organizing and reading PDF files, capture web content, with support for adding annotations


  • Organization and reading of documents and books in PDF format;
  • Capture HTML pages (web) and save to Polar library (locally on your hard drive);
  • It is possible to track the progress of reading each document. The document opens where you left off;
  • All content is stored locally, i.e. you can work offline, but there is a possibility of synchronization between other computers with the built-in Polar service (there is a free plan: 2 active devices, up to 350 MB, up to 100 web page captures);
  • It is possible to add annotations to PDF documents and saved web pages, as well as add comments and create an educational card from the annotation to the Anki program;
  • Viewer for Annotations and Notes. Integrated annotation viewer. Search, sort, and tag all annotations and comments in one place;
  • There are statistics on the progress of reading, on the types and number of documents read;
  • Integrated Document Viewer Integrated document reader (PDF, webpages) to the best reading experience;.
  • Area Highlights Capture a region of the page as a highlight which can be a chart, figure, infographic, etc.

For each document in the library, you can:

  • assign tags;
  • add a mark (flag);
  • add to archive;
  • add to folder.

Documents can be sorted by:

  • a keyword in the search bar;
  • tag;
  • note;
  • archiving;
  • folder.

Screenshots Software


The software Polar is available for installation on Linux, Windows and macOS.

Installation methodOS
DebUbuntu* 16.04/18.04/19.04/20.04, Linux Mint 18/19, Debian
SnapUbuntu, Linux Mint, Debian, Arch Linux, Fedora, CentOS, KDE Neon, openSUSE, elementary OS, Manjaro, Red Hat Enterprise Linux
AppImageUbuntu, Fedora, openSUSE, CentOS, elementaryOS, Linux Mint and others

*Ubuntu (GNOME), Kubuntu (KDE), Xubuntu (XFCE), Lubuntu (LXDE)

Install Software via Deb package

Install Software via Snap package

sudo snap install polar-bookshelf

Install Software via AppImage package

Install Software via EXE package on Windows

Install Software via DMG package for macOS

Software Information

Language Interface:English
Description version:1.100.13
Developer:Contributors Polar
Programming language:Electron
License:GPL v3
Software website:getpolarized.io

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