There are many alternatives to SumatraPDF for Windows if you are looking for a replacement. The best open source Windows alternative is Okular. If that doesn't suit you, our users have ranked more than 100 alternatives to SumatraPDF and 19 are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to SumatraPDF are MuPDF, Koodo Reader, Sioyek and Lector - PDF Reader.
Multi-platform document viewer offering extensive format support, including PDF, comics, images, EPUB, and Markdown, with annotation tools, sidebar previews, text-to-speech, DRM management, cross-platform compatibility, and integration with KDE Frameworks libraries.
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.
Koodo Reader is an all-in-one e-book reader that can help you better manage and study your e-books. It's free and open-source.
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
Cool Reader is fast and small cross-platform XML/CSS based eBook reader for desktops and handheld devices. Understands a number of text document formats, suppurt OPDS (in new ui-opengl version). Fully customizable palette, text reformatting with any font size, font...
WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options. It uses the free DjVuLibre library to decode DjVu documents. DjVu is a web-centric format and software platform for distributing documents...
MComix is an user-friendly, customizable image viewer. It is specifically designed to handle comic books, but also serves as a generic viewer. It reads images in ZIP, RAR, 7Zip or tar archives as well as plain image files.
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.
Bookworm is a document reader that allows you to read more than 15 document formats including PDF, EPUB, and MOBI using a versatile, yet simple, and highly accessible interface.
Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.
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Because both programs are design to see documents.