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Okular vs Sumatora

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

Okular icon
Okular
Sumatora icon
Sumatora

Okular vs Sumatora: The Verdict

⚡ Summary:

Okular: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.

Sumatora: Sumatora is a free, open-source eBook reader for Windows. It supports a variety of eBook formats including EPUB, MOBI, FB2, CHM, PDB, HTML, RTF, OEB and TCR. Sumatora is lightweight, customizable and offers features like bookmarks, annotations and different viewing modes.

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 Okular Sumatora
Sugggest Score — —
Category Office & Productivity News & Books
Pricing Free Open Source

Product Overview

Okular
Okular

Description: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.

Type: software

Pricing: Free

Sumatora
Sumatora

Description: Sumatora is a free, open-source eBook reader for Windows. It supports a variety of eBook formats including EPUB, MOBI, FB2, CHM, PDB, HTML, RTF, OEB and TCR. Sumatora is lightweight, customizable and offers features like bookmarks, annotations and different viewing modes.

Type: software

Pricing: Open Source

Key Features Comparison

Okular
Okular Features
  • Supports viewing PDF, PostScript, DjVu, CHM, XPS, ePub and other formats
  • Allows annotating, highlighting and adding comments to PDFs
  • Has different view modes like single page, facing, overview grid
  • Supports tabs for opening multiple documents
  • Has presentation mode for slideshows
  • Can fill interactive PDF forms
  • Allows saving filled forms as PDF or text
  • Has search functionality to find text in documents
  • Can encrypt PDF files
  • Has document information and metadata viewer
  • Supports table of contents navigation
  • Has different reflow modes for reading ePubs
  • Can print documents to system printer
Sumatora
Sumatora Features
  • Supports a variety of eBook formats including EPUB, MOBI, FB2, CHM, PDB, HTML, RTF, OEB and TCR
  • Lightweight and customizable
  • Offers features like bookmarks, annotations and different viewing modes

Pros & Cons Analysis

Okular
Okular

Pros

  • Free and open source
  • Clean and intuitive interface
  • Good performance with large PDFs
  • Lots of annotation and markup tools
  • Supports many document formats
  • Available on Linux, Windows, macOS

Cons

  • Limited format support compared to some alternatives
  • Annotation features may be limited for some users
  • No cloud storage integration
  • Less features than paid alternatives
Sumatora
Sumatora

Pros

  • Free and open source
  • Supports many eBook formats
  • Customizable
  • Good features like bookmarks and annotations

Cons

  • Only available on Windows
  • Limited features compared to paid eBook readers
  • Less popular than other eBook readers

Pricing Comparison

Okular
Okular
  • Free
Sumatora
Sumatora
  • Open Source

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Learn More About Each Product

Okular
Okular
Reviews, pricing & alternatives →
Sumatora
Sumatora
Reviews, pricing & alternatives →

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