Sumatra PDF is a free and open-source PDF reader for Windows. It is known for its simplicity, lightweight nature, and fast performance.
Best CHM Reader Pro Alternatives ranked by AI · updated May 2025
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CHM Reader Pro is a feature-rich software for reading CHM files with advanced functionalities.
Price: $19.99
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Top 6 CHM Reader Pro alternatives
STDU Viewer is a free viewer for multiple file formats, including PDF, TIFF, and DjVu.
Icecream Ebook Reader is a feature-rich ebook reader for Windows that supports various ebook formats.
Free basic version, Pro version available for $19.95
Calibre is a free and open-source e-book management tool that allows users to organize, edit, and read e-books in various formats.
Document Viewer is a software tool that allows users to view and interact with various types of documents such as PDFs, Word...
Free with premium options available
Okular is a universal document viewer developed by KDE. It supports multiple document formats and provides features like annotations, highlighting, and digital...
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