Okular is a universal document viewer based developed by KDE. Developed by The Okular Team
License: Open Source
MuPDF is a free and open-source software framework written in C that implements a PDF, XPS, and EPUB parsing and rendering engine. It is used primarily to render pages into bitmaps, but also provides support for other operations such as searching and listing the table of contents and hyperlinks. Developed by Artifex Software, Inc.
License: Open Source
MuPDF is a lightweight and fast PDF viewer that excels in performance and customization, making it ideal for users needing quick access to large files. In contrast, Okular offers extensive annotation tools and cloud integration, making it suitable for users who require collaborative features and a user-friendly interface.