Firefox PDF Viewer (PDF.js) vs Okular : Which is Better?

Firefox PDF Viewer (PDF.js) icon

Firefox PDF Viewer (PDF.js)

PDF.js. A general-purpose, web standards-based platform for parsing and rendering PDFs. Developed by Mozilla Labs

License: Open Source

Categories: Office & Productivity Web Browsers

Apps available for Mac OS X Windows Linux Google Chrome Opera

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Okular icon

Okular

Okular is a universal document viewer based developed by KDE. Developed by The Okular Team

License: Open Source

Categories: News & Books Office & Productivity

Apps available for Linux BSD KDE

Firefox PDF Viewer (PDF.js) VS Okular

Firefox PDF Viewer (PDF.js) is a lightweight and integrated tool ideal for quick PDF viewing within the browser, while Okular offers a more comprehensive feature set for document management and annotation, suitable for users needing advanced functionalities.

Firefox PDF Viewer (PDF.js)

Pros:

  • Lightweight and fast
  • Integrated into Firefox browser
  • Supports a wide range of PDF features
  • Easy to use with no installation required
  • Open-source and regularly updated

Cons:

  • Limited advanced features compared to dedicated PDF software
  • No standalone application; requires Firefox
  • Basic annotation features only

Okular

Pros:

  • Supports a wide range of document formats (PDF, EPUB, etc.)
  • Annotation tools for highlighting and commenting
  • Supports advanced features like form filling and digital signatures
  • Multi-platform support (Linux, Windows, macOS)
  • Customizable interface with various viewing modes

Cons:

  • Heavier on system resources compared to PDF.js
  • More complex user interface for beginners
  • Requires installation and setup

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