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Cool Reader vs SumatraPDF

Professional comparison and analysis to help you choose the right software solution for your needs.

Cool Reader icon
Cool Reader
SumatraPDF icon
SumatraPDF

Cool Reader vs SumatraPDF: The Verdict

⚡ Summary:

Cool Reader : Cool Reader is an open-source eBook reader available for Windows, Linux, Android and other platforms. It supports a variety of eBook formats including EPUB, FB2, DOC and more. Key features include customizable themes/skins, text-to-speech, bookmarks and annotations.

SumatraPDF: SumatraPDF is a free and open-source PDF, eBook, XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. It is lightweight, customizable, and supports many advanced PDF features.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature Cool Reader SumatraPDF
Sugggest Score — —
Category News & Books Office & Productivity
Pricing Open Source Open Source

Product Overview

Cool Reader
Cool Reader

Description: Cool Reader is an open-source eBook reader available for Windows, Linux, Android and other platforms. It supports a variety of eBook formats including EPUB, FB2, DOC and more. Key features include customizable themes/skins, text-to-speech, bookmarks and annotations.

Type: software

Pricing: Open Source

SumatraPDF
SumatraPDF

Description: SumatraPDF is a free and open-source PDF, eBook, XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. It is lightweight, customizable, and supports many advanced PDF features.

Type: software

Pricing: Open Source

Key Features Comparison

Cool Reader
Cool Reader Features
  • Supports wide variety of eBook formats including EPUB, FB2, DOC, TXT, RTF, HTML, CHM, PDB, PDF
  • Customizable themes/skins
  • Adjustable text size, fonts, colors, margins
  • Text-to-speech with multiple voices
  • Bookmarks and annotations
  • Dictionary lookup
  • Supports reading in over 40 languages
  • Can open books from cloud storage services like Dropbox
  • Available on Windows, Linux, Android, and other platforms
SumatraPDF
SumatraPDF Features
  • Lightweight and fast PDF reader
  • Supports many document formats like PDF, ePub, MOBI, XPS, DjVu, CHM, CBZ, CBR
  • Customizable with themes, keyboard shortcuts
  • Tabbed document interface
  • Supports annotations and highlighting
  • Continuous scrolling
  • Supports reflowable text
  • Supports digital signatures
  • Supports comics book formats
  • Supports eBooks
  • Supports syncing open documents across devices

Pros & Cons Analysis

Cool Reader
Cool Reader
Pros
  • Free and open source
  • Lightweight and fast
  • Highly customizable reading experience
  • Supports many formats
  • Available on multiple platforms
Cons
  • Limited formatting options compared to some other eBook readers
  • Less features than some commercial eBook readers
  • PDF support could be better
  • No native support for ePub 3
SumatraPDF
SumatraPDF
Pros
  • Lightweight and fast
  • Supports many document formats
  • Free and open source
  • Customizable
  • Good support for comics and eBooks
Cons
  • Limited annotation features compared to advanced PDF editors
  • Lacks OCR capabilities
  • No cloud storage integration
  • No mobile apps

Pricing Comparison

Cool Reader
Cool Reader
  • Open Source
SumatraPDF
SumatraPDF
  • Open Source

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Learn More About Each Product

Cool Reader
Cool Reader
Reviews, pricing & alternatives →
SumatraPDF
SumatraPDF
Reviews, pricing & alternatives →

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