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 open-source PDF viewer that excels in fast performance and rendering quality, while Nitro Reader offers a more user-friendly experience with advanced editing and annotation tools. Users seeking a free and efficient PDF solution may prefer MuPDF, whereas those needing robust editing features might opt for Nitro Reader.