Multi-platform document viewer offering extensive format support, including PDF, comics, images, EPUB, and Markdown, with annotation tools, sidebar previews, text-to-speech, DRM management, cross-platform compatibility, and integration with KDE Frameworks libraries.
Cost / License
- Free
- Open Source
Application types
Platforms
- Windows
- Linux
- BSD
- KDE Plasma
- Snapcraft
- Linux Mobile
- Flathub
- Haiku




Okular is the most popular Windows & Linux alternative to PDF Expert.
Okular is the most popular Open Source & free alternative to PDF Expert.
- Okular is Free and Open Source
- Okular is Lightweight and Privacy focused






















































the free version does not allow editing like PDF Expert, whereas other products that allow editing are available for Windows only and do not support Mac.