Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

MuPDF is described as 'Highly versatile PDF and XPS solution offering customizable rendering and viewing with features like digital signatures, redactions, and annotations' and is a very popular PDF Reader in the office & productivity category. There are more than 50 alternatives to MuPDF for a variety of platforms, including Windows, Mac, Linux, Android and Web-based apps. The best MuPDF alternative is SumatraPDF, which is both free and Open Source. Other great apps like MuPDF are Okular, Foxit PDF Reader, Xournal++ and Evince.
Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

PDF X is a productive PDF reader & editor for Windows. It's powerful for users to view, print, edit, and annotate Adobe Acrobat PDFs.




SpeedyNote is a fast, open-source note-taking application designed for stylus users who need iPad-quality annotation on budget hardware. Built with native C++ and Qt, it delivers 360Hz stylus input on hardware as modest as an Intel Celeron N4000 at 1.



Supercharge your paper reading: follow references, skim outline, jump to figures, cite and save.




Apryse, previously known as PDFTron, takes document solutions to the next level, making work better and life simpler.




Comix is an image viewer specifically designed to handle comic books. It reads ZIP, RAR and tar archives (also gzip or bzip2 compressed), as well as plain image files. It has a simple and user-friendly GUI using PyGTK.




EBookDroid is an open source (GPL'ed) document viewer for Android based on the VuDroid code base.


Ashampoo PDF Free is a software for opening, reading, and creating PDF files. It includes a built-in printer driver for generating PDFs from any Windows application, a compact and fast PDF reader, and the ability to fill out interactive and static forms.


AI powered productivity tool for reading, understanding and taking notes on PDFs and long websites. Users can search, summarise, extract and define keywords, ask google-search type questions and be taken straight to the answers.




Xreader is a document viewer capable of displaying multiple and single page document formats like PDF and Postscript.
A privacy-first, client-side PDF editor that runs in your browser. Edit, annotate, merge/split, compress to target sizes, OCR scanned PDFs, and convert files—no signup, no watermark.



