Firefox PDF Viewer (PDF.js) AlternativesOnly apps categorised as PDF Editors

The best PDF Editor alternative to Firefox PDF Viewer (PDF.js) is Okular, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Firefox PDF Viewer (PDF.js) and many of them are PDF Editors so hopefully you can find a suitable replacement. Other interesting PDF Editor alternatives to Firefox PDF Viewer (PDF.js) are Foxit PDF Reader, Xodo, Qoppa PDF Studio and KDAN PDF Reader.

Firefox PDF Viewer (PDF.js) iconFirefox PDF Viewer (PDF.js)
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PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within...

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Firefox PDF Viewer (PDF.js) alternatives page was last updated Apr 30, 2025
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  1. Okular icon

    Okular

     450 likes
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    Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.

    110 Okular alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Windows
    • Linux
    • BSD
    • KDE Plasma
    • Linux Mobile
    • Haiku
    • Snapcraft
    • Flathub
    Okular screenshot 1

    Properties

    1.  Lightweight
    2.  Privacy focused

    Features

    1.  PDF annotation
    2.  Text Highlighting
    3.  Tabbed interface
    4.  Dark Mode
    5.  Ad-free
    6.  Low memory usage
    7.  KDE
    8.  Works Offline
    9.  Customizable shortcuts
    10.  Text to Speech
    11.  Fill PDF Forms
    12.  No Tracking

    Okular VS Firefox PDF Viewer (PDF.js)

     

    • Okular is the most popular Linux alternative to Firefox PDF Viewer (PDF.js).

    • Okular is Free and Open SourceFirefox PDF Viewer (PDF.js) is also Free and Open Source
    • Okular is Lightweight and Privacy focusedFirefox PDF Viewer (PDF.js) is not according to our users
  2. Foxit PDF Reader icon

    Foxit PDF Reader

     1370 likes
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    Foxit Reader offers a lightweight PDF viewing experience across multiple platforms with features such as annotation, form filling, signing, cloud storage integration, collaborative review options, heightened security via Trust Manager, and organizational tools like Group Policy and XML Configuration.

    116 Foxit PDF Reader alternatives

    License model

    • Free Personal • Proprietary

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Windows
    • ReactOS
    Foxit PDF Reader screenshot 1
    Bundleware

    The installer tries to install McAfee WebAdvisor and PhantomPDF Business. These can be skipped by clicking Decline on each.

    Properties

    1.  Lightweight

    Features

    1.  PDF annotation
    2.  Fill PDF Forms
    3.  Sign PDF files
    4.  Highlighter
    5.  Scan documents
    6.  Text to Speech
    7.  Tablet support
    8.  Booklet printing
    9.  Support for scripting
    10.  Text Highlighting
    11.  Portable
    12.  Spell Checking

    Foxit PDF Reader VS Firefox PDF Viewer (PDF.js)

     

    • Foxit PDF Reader is the most popular Mac alternative to Firefox PDF Viewer (PDF.js).

    • Foxit PDF Reader is Free Personal and ProprietaryFirefox PDF Viewer (PDF.js) is Free and Open Source
    • Foxit PDF Reader is LightweightFirefox PDF Viewer (PDF.js) is not according to our users
  4. Xodo icon

    Xodo

     70 likes
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    Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, mark up, sort, share, sync, manage, sign, and more with even the most complex PDF documents.

    112 Xodo alternatives

    License model

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Windows
    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Google Chrome
    Xodo PDF - comment, highlight, underline & more

    Properties

    1.  Lightweight

    Features

    1.  PDF annotation
    2.  Dark Mode
    3.  Export to PDF
    4. Google Drive icon  Google Drive integration
    5.  Sign PDF files
    6.  Annotations
    7.  Ad-free
    8.  Combine PDF
    9.  Split PDF files
    10.  OCR
    11.  Real time collaboration
    12.  Split and merge PDF files

    Xodo VS Firefox PDF Viewer (PDF.js)

     

    • Xodo is the most popular Web-based alternative to Firefox PDF Viewer (PDF.js).

    • Xodo is the most popular commercial alternative to Firefox PDF Viewer (PDF.js).

    • Xodo is Paid and ProprietaryFirefox PDF Viewer (PDF.js) is Free and Open Source
    • Xodo is LightweightFirefox PDF Viewer (PDF.js) is not according to our users
  5. Ad
    Screenshot
    Foxit PDF Reader icon
    Foxit PDF Reader

    Foxit Reader offers a lightweight PDF viewing experience across multiple platforms with features such as annotation, form filling, signing, cloud storage integration, collaborative review options, heightened security via Trust Ma...

    https://www.foxit.com
    Learn More
  6. Qoppa PDF Studio icon

    Qoppa PDF Studio

     81 likes
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    Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.

    174 Qoppa PDF Studio alternatives

    License model

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Mac
    • Windows
    • Linux
    • Chrome OS
    Annotate

    Properties

    1.  Lightweight

    Features

    1.  Edit PDF
    2.  Sign PDF files
    3.  Scan to PDF
    4.  PDF Redaction
    5.  Convert PDF to Word document
    6.  Create PDF files
    7.  Fill PDF Forms
    8.  Dark Mode
    9.  Text to Speech
    10.  OCR
    11.  Spell Checking
    12.  Ad-free

    Qoppa PDF Studio VS Firefox PDF Viewer (PDF.js)

     
  7. KDAN PDF Reader icon

    KDAN PDF Reader

     184 likes
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    KDAN PDF Reader is tailored for a hybrid workplace, providing AI-driven PDF document services to enhance efficiency in cross-device document management and enable seamless workflows across mobile and desktop platforms.

    241 KDAN PDF Reader alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • TW flagTaiwan

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • Android Tablet
    • iPad
    Your All-in-One PDF Editor

    Properties

    1.  Privacy focused

    Features

    1.  Scan documents
    2.  Freehand Writing
    3.  Sign PDF files
    4.  Multiple languages
    5.  PDF compression
    6.  Combine PDF
    7.  Full-Text Search
    8.  Split PDF files
    9.  Built-in viewer
    10.  Dark Mode
    11.  Text to Speech
    12.  Works Offline

    KDAN PDF Reader VS Firefox PDF Viewer (PDF.js)

     
    Comments about KDAN PDF Reader as an Alternative to Firefox PDF Viewer (PDF.js)
    Rosalind Morris
    Positive •Feb 22, 2019
    0

    PDF Reader is reliable and does its job faster.

    Firefox PDF Viewer (PDF.js) Icon
    KDAN PDF Reader icon
    • KDAN PDF Reader is Freemium and ProprietaryFirefox PDF Viewer (PDF.js) is Free and Open Source
    • KDAN PDF Reader is Privacy focusedFirefox PDF Viewer (PDF.js) is not according to our users
  8. Adobe Acrobat PDF Extension icon

    Adobe Acrobat PDF Extension

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    Do more than just view your PDF files online. With the Acrobat extension, you can mark up proposals, leave sticky note comments, and use your favorite PDF tools without leaving your browser.

    2 Adobe Acrobat PDF Extension alternatives

    License model

    • Freemium • Proprietary

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Google Chrome
    • Microsoft Edge

    Adobe Acrobat PDF Extension Features

    1.  PDF compression
    2.  PDF annotation
    3.  Sign PDF files
    4.  Combine PDF
    5.  AI-Powered
    6.  Built-in PDF converter

    Adobe Acrobat PDF Extension VS Firefox PDF Viewer (PDF.js)

     
  10. Kami icon

    Kami

     17 likes
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    Cloud-based PDF viewer and annotation tool for your browser. Perfect for Chromebook 1:1 schools. View, export, print and share your PDF files straight from your browser. Kami works on all browsers and works best with Google Chrome.

    81 Kami alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • NZ flagNew Zealand

    Platforms

    • Online
    • Google Chrome

    Kami Features

    1.  PDF annotation

    Kami VS Firefox PDF Viewer (PDF.js)

     
  11. PDF Max Pro icon

    PDF Max Pro

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    PDF Max is a desktop class PDF app for reading, annotating or signing PDF documents on your iPhone/iPad. Mark up documents with highlights and handwriting, insert texts and stamps, fill out, sign PDFs and even manipulate PDF pages.

    51 PDF Max Pro alternatives

    License model

    Application types

    Platforms

    • iPhone
    • iPad
    PDF Max Pro screenshot 1

    PDF Max Pro Features

    1.  Combine PDF
    2.  PDF annotation
    3.  Create PDF files
    4.  Export to PDF

    PDF Max Pro VS Firefox PDF Viewer (PDF.js)

     
  12. SimplePDF (simplepdf.eu) icon

    SimplePDF (simplepdf.eu)

     1 like
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    Edit your PDFs directly from your browser. Sign your PDFs in a few seconds. A modern tool to fill and edit your PDFs

    25 SimplePDF (simplepdf.eu) alternatives

    License model

    • Free • Proprietary

    Application types

    Country of Origin

    • DK flagDenmark
    • European Union flagEU

    Platforms

    • Online
    • Software as a Service (SaaS)
    Edit, fill and sign PDF files

    Properties

    1.  Privacy focused

    Features

    1.  PDF annotation
    2.  Combine PDF
    3.  Sign PDF files
    4.  Ad-free
    5.  Fill PDF Forms
    6.  Split PDF files
    7.  Edit PDF

    SimplePDF (simplepdf.eu) VS Firefox PDF Viewer (PDF.js)

     

    • SimplePDF (simplepdf.eu) is the most popular SaaS alternative to Firefox PDF Viewer (PDF.js).

    • SimplePDF (simplepdf.eu) is Free and ProprietaryFirefox PDF Viewer (PDF.js) is Free and Open Source
    • SimplePDF (simplepdf.eu) is Privacy focusedFirefox PDF Viewer (PDF.js) is not according to our users
  13. Icecream PDF Editor icon

    Icecream PDF Editor

     13 likes
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    Excellent powerful tool to edit PDF, annotate PDF, redact, protect and more.

    PRO Version includes: Remove default watermark Combine PDF files Lifetime license - Windows Commercial use Priority Support.

    50 Icecream PDF Editor alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • RU flagRussia

    Platforms

    • Windows
    Add images and objects

    Icecream PDF Editor Features

    1.  PDF annotation
    2.  Create PDF files
    3.  Edit PDF
    4.  PDF Redaction

    Icecream PDF Editor VS Firefox PDF Viewer (PDF.js)

     
  14. PDF4QT icon

    PDF4QT

     5 likes
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    Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.

    87 PDF4QT alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • CZ flagCzechia
    • European Union flagEU

    Platforms

    • Windows
    • Linux
    • Flathub
    PDF4QT screenshot 1

    Properties

    1.  Lightweight
    2.  Privacy focused

    Features

    1.  Dark Mode
    2.  Ad-free
    3.  Hardware Accelerated
    4.  Sign PDF files
    5.  PDF annotation
    6.  PDF compression
    7.  Text to Speech
    8.  Portable
    9.  QT Based
    10.  Support for Multiple threads

    PDF4QT VS Firefox PDF Viewer (PDF.js)

     
  15. SourcePDF icon

    SourcePDF

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    SourcePDF is a completely free to use PDF editor.

    82 SourcePDF alternatives

    License model

    • Free • Open Source

    Application types

    Platforms

    • Windows
    • Linux
    SourcePDF screenshot 1
    Discontinued

    The GitHub page states that “the project is deprecated”.

    SourcePDF Features

    1.  PDF compression
    2.  Combine PDF

    SourcePDF VS Firefox PDF Viewer (PDF.js)

     
12 of 25 Firefox PDF Viewer (PDF.js) alternatives