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Forgotten Books vs SumatraPDF

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

Forgotten Books icon
Forgotten Books
SumatraPDF icon
SumatraPDF

Forgotten Books vs SumatraPDF: The Verdict

⚡ Summary:

Forgotten Books: Forgotten Books is an online library offering over 2 million books for free in PDF, EPUB and Kindle formats. Its collection includes public domain books and user-contributed books across a wide range of genres.

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 Forgotten Books SumatraPDF
Sugggest Score — —
Category News & Books Office & Productivity
Pricing Free Open Source

Product Overview

Forgotten Books
Forgotten Books

Description: Forgotten Books is an online library offering over 2 million books for free in PDF, EPUB and Kindle formats. Its collection includes public domain books and user-contributed books across a wide range of genres.

Type: software

Pricing: Free

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

Forgotten Books
Forgotten Books Features
  • Access to over 2 million free books in PDF, EPUB and Kindle formats
  • Includes public domain books and user-contributed content
  • Wide range of genres and topics
  • Books can be read online or downloaded
  • Searchable library catalog
  • Highlighting and bookmarking capabilities
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

Forgotten Books
Forgotten Books

Pros

  • Huge selection of free books
  • Variety of formats supported
  • Easy to use interface
  • Ability to download books for offline reading
  • Community contributions expand available content

Cons

  • Limited organization and discovery features
  • Minimal reading experience compared to dedicated ereaders
  • User-contributed books vary in quality
  • Some books only available in certain formats
  • Advertising on the site
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

Forgotten Books
Forgotten Books
  • Free
SumatraPDF
SumatraPDF
  • Open Source

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Learn More About Each Product

Forgotten Books
Forgotten Books
Reviews, pricing & alternatives →
SumatraPDF
SumatraPDF
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