Firefox PDF Viewer (PDF.js) Alternatives

Firefox PDF Viewer (PDF.js) is described as 'PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within Mozilla Firefox almost all PDF files found on the web without a plugin' and is a very popular PDF Reader in the web browsers category. There are more than 50 alternatives to Firefox PDF Viewer (PDF.js) for a variety of platforms, including Windows, Linux, Mac, Android and Web-based apps. The best Firefox PDF Viewer (PDF.js) alternative is SumatraPDF, which is both free and Open Source. Other great apps like Firefox PDF Viewer (PDF.js) are Okular, Foxit PDF Reader, Evince and MuPDF.

Firefox PDF Viewer (PDF.js) iconFirefox PDF Viewer (PDF.js)
  165
  • ...

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

More about Firefox PDF Viewer (PDF.js)
More about Firefox PDF Viewer (PDF.js)
Firefox PDF Viewer (PDF.js) alternatives page was last updated Apr 30, 2025
Copy a direct link to this comment to your clipboard
  1. PDF Viewer Pro by PSPDFKit icon

    PDF Viewer Pro by PSPDFKit

     2 likes
    Copy a direct link to this comment to your clipboard

    PDF Viewer Pro is a fast and beautiful app, allowing you to view, search, and annotate PDF documents with ease on your iPhone and iPad.

    License model

    • Freemium • Proprietary

    Application type

    Country of Origin

    • AT flagAustria
    • European Union flagEU

    Platforms

    • Mac
    • Android
    • iPhone
    • iPad
    • Android Tablet
    PDF Viewer Pro by PSPDFKit screenshot 1
    PDF Viewer Pro by PSPDFKit screenshot 2
    PDF Viewer Pro by PSPDFKit screenshot 3

    Properties

    1.  Privacy focused

    Features

    1.  Dark Mode
    2.  No registration required
    3.  Cloud Sync

    PDF Viewer Pro by PSPDFKit VS Firefox PDF Viewer (PDF.js)

     
  2. Universal Viewer icon

    Universal Viewer

     22 likes
    Copy a direct link to this comment to your clipboard

    Universal Viewer is an advanced file viewer for wide range of formats. Supported file formats are:

    161 Universal Viewer alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • RU flagRussia

    Platforms

    • Windows
    Image is shown
    Discontinued

    The latest version (6.7.9) is from 2021.

    Universal Viewer Features

    1.  Portable
    2.  Support for Large File

    Universal Viewer VS Firefox PDF Viewer (PDF.js)

     
  4. PDF Max Pro icon

    PDF Max Pro

     Like
    Copy a direct link to this comment to your clipboard

    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.

    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)

     
  5. Ad
    Screenshot
    iTop PDF icon
    iTop PDF

    Comprehensive PDF tool for viewing, editing, annotations, and conversion between formats like Word, Excel, or PPT. Features include encryption, redaction, and fast batch processing.

    https://pdf.itopvpn.com
    Learn More
  6. Pdf Viewer Plus icon

    Pdf Viewer Plus

     9 likes
    Copy a direct link to this comment to your clipboard

    A simple PDF document viewer.

    License model

    • Free • Open Source

    Application type

    Platforms

    • Android
    • F-Droid
    Pdf Viewer Plus screenshot 1
    Discontinued

    This app is discontinued and the spirital successor is MJ PDF (which is endorsed by the developer of PDF Viewer Plus). You can read the official statement on their GitHub: "https://github.com/JavaCafe01/PdfViewer"

    Properties

    1.  Customizable

    Features

    1.  Convert PDF to Word document

    Pdf Viewer Plus VS Firefox PDF Viewer (PDF.js)

     
  7. SimplePDF (simplepdf.eu) icon

    SimplePDF (simplepdf.eu)

     1 like
    Copy a direct link to this comment to your clipboard

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

    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
  8. CloudPDF icon

    CloudPDF

     1 like
    Copy a direct link to this comment to your clipboard

    Comprehensive solutions for displaying, securing, and tracking your PDFs, with the option to transform them into powerful lead magnets.

    License model

    Application type

    Platforms

    • Online
    • React
    • Weebly
    • JavaScript
    • AngularJS
    • WiX.com
    • HTML
    • Typescript
    • Squarespace
    • Blogger
    • Wordpress
    • Vue.js
    • LeadPages
    Picture of the PDF viewer

    Properties

    1.  Privacy focused

    Features

    1.  Full-Text Search
    2.  Dark Mode

    CloudPDF VS Firefox PDF Viewer (PDF.js)

     
  10. Sav PDF Viewer icon

    Sav PDF Viewer

     3 likes
    Copy a direct link to this comment to your clipboard

    The simplest PDF viewer. Safe (doesn't require permissions), lightweight (just 6,9MB) and modern.

    License model

    Application type

    Country of Origin

    • IT flagItaly
    • European Union flagEU

    Platforms

    • Android
    • HUAWEI AppGallery
    • F-Droid
    • Kindle Fire
    Sav PDF Viewer screenshot 1

    Properties

    1.  Privacy focused
    2.  Lightweight

    Features

    1.  Dark Mode
    2.  No registration required
    3.  Ad-free
    4.  Works Offline
    5.  No Tracking
    6.  No Permissions required

    Sav PDF Viewer VS Firefox PDF Viewer (PDF.js)

     
  11. Right PDF Reader icon

    Right PDF Reader

     12 likes
    Copy a direct link to this comment to your clipboard

    Besides exceptionally fast launching and displaying speed, Gaaiho Reader is reliable in printing, filling forms annotating documents and adding bookmarks.

    81 Right PDF Reader alternatives

    License model

    Application types

    Country of Origin

    • TW flagTaiwan

    Platforms

    • Windows
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Mac
    Right PDF Reader screenshot 1

    Properties

    1.  Lightweight

    Features

    1.  Dark Mode
    2.  PDF annotation
    3.  PDF encryption
    4.  Sign PDF files
    5.  Fill PDF Forms
    6.  Full-Text Search
    7.  Text to Speech
    8.  Built-in File Manager

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

     
  12. SlimPDF Reader icon

    SlimPDF Reader

     8 likes
    Copy a direct link to this comment to your clipboard

    SlimPDF Reader is a high quality PDF viewer that is only 1.5MB in size. Features and benefits:

    • Eliminate bloatware and help your computer run faster;
    • View any PDF File just like Adobe Reader;
    • 100% Free;
    • The smallest desktop PDF Reader in the World.

    License model

    • Free • Proprietary

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Windows
    SlimPDF Reader screenshot 1

    SlimPDF Reader VS Firefox PDF Viewer (PDF.js)

     
  13. STDU Viewer icon

    STDU Viewer

     93 likes
    Copy a direct link to this comment to your clipboard

    Are you tired from many viewers one for each document? Do you want to have, one program for all your technical documentations, scientific books and so on? Do you want to have program, which fast opens files, fast loads pages and fast renders page to screen? And all of this in fre.

    89 STDU Viewer alternatives

    License model

    • Free Personal • Proprietary

    Application types

    Country of Origin

    • RU flagRussia

    Platforms

    • Windows
    STDU Viewer screenshot 1
    Discontinued

    The program is no longer updated. Last version, 1.6.375, released in April 2015, can be still downloaded from the official website

    Properties

    1.  Lightweight

    Features

    1.  Ad-free
    2.  Portable
    3.  Tabbed interface
    4.  Support for regular expressions

    STDU Viewer VS Firefox PDF Viewer (PDF.js)

     
  14. Icecream PDF Editor icon

    Icecream PDF Editor

     13 likes
    Copy a direct link to this comment to your clipboard

    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)

     
  15. PDF4QT icon

    PDF4QT

     5 likes
    Copy a direct link to this comment to your clipboard

    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)

     
You are at page 3 of Firefox PDF Viewer (PDF.js) alternatives