Okular vs Firefox PDF Viewer (PDF.js)

Struggling to choose between Okular and Firefox PDF Viewer (PDF.js)? Both products offer unique advantages, making it a tough decision.

Okular is a Office & Productivity solution with tags like pdf, epub, odt, annotating, highlighting, commenting, form-filling.

It boasts features such as 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 and pros including 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.

On the other hand, Firefox PDF Viewer (PDF.js) is a Web Browsers product tagged with open-source, pdf, viewer, firefox, browser-plugin.

Its standout features include In-browser PDF viewer, No browser plugins required, Fast page rendering, Text search, Page zoom, Printing, Document outline, Annotations, and it shines with pros like Lightweight, Open source, Secure, Fast load times, Works offline, Consistent experience across devices.

To help you make an informed decision, we've compiled a comprehensive comparison of these two products, delving into their features, pros, cons, pricing, and more. Get ready to explore the nuances that set them apart and determine which one is the perfect fit for your requirements.

Okular

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.

Categories:
pdf epub odt annotating highlighting commenting form-filling

Okular Features

  1. Supports viewing PDF, PostScript, DjVu, CHM, XPS, ePub and other formats
  2. Allows annotating, highlighting and adding comments to PDFs
  3. Has different view modes like single page, facing, overview grid
  4. Supports tabs for opening multiple documents
  5. Has presentation mode for slideshows
  6. Can fill interactive PDF forms
  7. Allows saving filled forms as PDF or text
  8. Has search functionality to find text in documents
  9. Can encrypt PDF files
  10. Has document information and metadata viewer
  11. Supports table of contents navigation
  12. Has different reflow modes for reading ePubs
  13. Can print documents to system printer

Pricing

  • Open Source

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


Firefox PDF Viewer (PDF.js)

Firefox PDF Viewer (PDF.js)

Firefox PDF Viewer (PDF.js) is an open source PDF viewer that is built into Firefox. It allows you to view PDFs directly in the browser without needing an external plugin.

Categories:
open-source pdf viewer firefox browser-plugin

Firefox PDF Viewer (PDF.js) Features

  1. In-browser PDF viewer
  2. No browser plugins required
  3. Fast page rendering
  4. Text search
  5. Page zoom
  6. Printing
  7. Document outline
  8. Annotations

Pricing

  • Open Source
  • Free

Pros

Lightweight

Open source

Secure

Fast load times

Works offline

Consistent experience across devices

Cons

Limited annotation features

Lacks some advanced PDF features like form filling

Printing can be unreliable

Not as full-featured as standalone PDF apps