Ultra-small, ultra-fast, exceptional PDF rendering solution. MuPDF is a highly versatile, customizable PDF, XPS, and eBook interpreter solution that can be used across a wide range of applications as a PDF renderer, viewer, or toolkit. A few of the interactive features include digital signatures, PDF redactions, form filling, annotations, and page manipulation. The MuPDF API is designed for easy implementation and immediate productivity for developers, making it a perfect fit for mobile apps, eBooks, SaaS/Cloud, and embedded applications where speed and quality are key. MuPDF supports the widest range of document input and output formats in today's market. There are several versions of MuPDF consisting of a software library, command-line tools, and viewers for various platforms. The viewers can be downloaded from Google Play and the App Store. The SDK can be licensed from Artifex for commercial use or under the AGPL for open source use. MuPDF runs on a wide range of operating systems including Android, iOS, Windows, macOS, Linux, and Unix-like systems. Language bindings for Java, C++, and Python, as well as Web Viewers powered by WebAssembly, have been developed.