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Software · PDF: read, create, edit

Okular

Okular is a PDF reader, available on Windows, macOS and Linux: annotation and highlighting, Markdown support.

  • Completely free
  • Windows, macOS and Linux
  • Open source
  • No account

Overview

Okular is a PDF reader, available on Windows, macOS and Linux.

Features described in its Flathub listing, on its official website and in its Winget manifest: annotation and highlighting, Markdown support.

File formats mentioned: PDF, EPUB, DJVU and TIFF.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “View and annotate documents” — Flathub, 10 November 2026
  • “The Universal Document Viewer” — Winget, 10 November 2026
  • “Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.” — official website, 10 November 2026

At a glance

All of Okular is free: no feature is locked behind a paid plan, and its code is open.

Its licence could not be established at the source: check the terms on the official website.

Strengths

  • Annotate and highlight (capability established by the official page)
  • Sign or fill in a form (capability established by the official page)
  • Open source code
  • No account needed
  • Commercial use allowed

About

Okular is a universal document viewer developed by KDE. Okular works on multiple platforms, including but not limited to Linux, Windows, Mac OS X, *BSD, etc. Features: Supported Formats: PDF, PS, Tiff, DjVu, Images, DVI, XPS, Fiction Book, Comic Book, Plucker, EPub, Fax Sidebar with contents, thumbnails, reviews and bookmarks Annotations support

Description from Flathub — AppStream (Flathub)

Sources and checks

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