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

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

Apps available for Linux BSD KDE

Firefox PDF Viewer (PDF.js) VS Okular Feature comparision

Feature Firefox PDF Viewer (PDF.js) Okular
Browser integration
Google Chrome extension
Firefox extension
Add/remove pages
Browser extension
Google Chrome Extensions
Firefox Extensions
Support for Javascript
Lightweight
Opera extension
Low memory usage
Highlighter
Optimal performance
PDF annotation
Fill PDF Forms
Edit PDF
Handwriting recognition
Multiple languages
Export to PDF
Document annotations
Sync between devices
PDF OCR
Clean design
Customer support
Cross-platform
Portable
Vim key mapping
Built-in Image converter
Image resizing
Customizable
Google Drive integration
Night mode/Dark Theme
Ad-free
Tabbed interface
Chapter cursor
Document reader
Text Highlighting
Text to Speech
Trim margins
Batch conversion
Built-in e-Book converter
Built-in viewer
Scan documents
File transfer
Freehand Writing
iPhone/iPod sync
*community curated information: This table may not have the most accurate information. Please suggest changes

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