MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.
Cost / License
- Free
- Open Source
Application types
Platforms
- Windows
- Linux
- Android
- F-Droid
- Xfce




Comments about MuPDF as an Alternative to SumatraPDF
While the MuPDF library is very lightweight, this reader is more a proof of concept than a lightweight GUI. The MuPDF download is about 70 Mb, Sumatra is less than 10.

Most users think MuPDF is a great SumatraPDF alternative.
- MuPDF is Free and Open Source












































This is the core application within SumatraPDF so should be faster but with limited menus