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OpenAsar vs SumatraPDF

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

OpenAsar icon
OpenAsar
SumatraPDF icon
SumatraPDF

OpenAsar vs SumatraPDF: The Verdict

⚡ Summary:

OpenAsar: OpenAsar is an open-source replacement for the proprietary ASAR archive format used by Electron apps. It allows developers to inspect, modify, and repackage Electron app content more easily.

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 OpenAsar SumatraPDF
Sugggest Score — —
Category Development Office & Productivity
Pricing Open Source Open Source

Product Overview

OpenAsar
OpenAsar

Description: OpenAsar is an open-source replacement for the proprietary ASAR archive format used by Electron apps. It allows developers to inspect, modify, and repackage Electron app content more easily.

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

OpenAsar
OpenAsar Features
  • Unpacks and repacks ASAR files
  • Inspects and modifies app content
  • Open source and cross-platform
  • Command line interface
  • JavaScript API
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

OpenAsar
OpenAsar

Pros

  • Free and open source
  • Allows modifying Electron apps
  • Better than proprietary ASAR format
  • Active development and support

Cons

  • Less widely used than ASAR format
  • Requires learning new tool
  • Less support from Electron compared to ASAR
  • Potential compatibility issues
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

OpenAsar
OpenAsar
  • Open Source
SumatraPDF
SumatraPDF
  • Open Source

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Learn More About Each Product

OpenAsar
OpenAsar
Reviews, pricing & alternatives →
SumatraPDF
SumatraPDF
Reviews, pricing & alternatives →

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