Firefox PDF Viewer (PDF.js) icon
Firefox PDF Viewer (PDF.js) icon

Firefox PDF Viewer (PDF.js)

 165 likes

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.

Firefox PDF Viewer (PDF.js) screenshot 1

License model

  • Free • Open Source

Application type

Country of Origin

  • US flagUnited States

Platforms

  • Google Chrome
  • Opera
  • Mozilla Firefox
Firefox PDF Viewer (PDF.js) screenshot 1
Alternatives  
3.8 / 5 Avg rating (4)
165likes
4comments
82alternatives
0news articles

Features

Suggest and vote on features

Properties

  1.  Lightweight
  2.  Privacy focused

Features

  1.  Browser integration
  2.  Add/remove pages
  3.  PDF annotation
  4.  Ad-free
  5.  No Tracking
  6.  Dark Mode
  7.  Works Offline
  8.  Full-Text Search
  9.  No registration required
  10.  Browser extension
  11.  Opera extension
  12.  Support for Javascript

 Tags

Firefox PDF Viewer (PDF.js) News & Activities

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Firefox PDF Viewer (PDF.js) information

  • Developed by

    US flagMozilla

  • Licensing

    Open Source (Apache-2.0) and Free product.

  • Written in

  • Rating

    Average rating of 3.8

  • Alternatives

    82 alternatives listed

  • Supported Languages

    • English

AlternativeTo Categories

Web Browsers, Office & Productivity

GitHub repository

  •  51,057 Stars
  •  10,345 Forks
  •  420 Open Issues
  •   Updated Jun 17, 2025 
View on GitHub

Popular alternatives

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Our users have written 4 comments and reviews about Firefox PDF Viewer (PDF.js), and it has gotten 165 likes

Firefox PDF Viewer (PDF.js) was added to AlternativeTo by piotrex on Jan 13, 2013 and this page was last updated Aug 13, 2024. Firefox PDF Viewer (PDF.js) is sometimes referred to as Firefox PDF Viewer, PDF.js.

Comments and Reviews

   
 Post comment/review
Top Positive Comment
Tubby 9417
★
★
★
★
★
Jul 17, 2024
0

I like my Frankenstein chrome with the firefox pdf viewer in it. Funny and useful at the time. This sight is hilarious

Top Negative Comment
Anael
★
★
★
★
★
Sep 11, 2013
-2

I tried and I wasn't convinced. The letters appear messy and uneven, spacing varies with the zoom,... Not a good tool. In firefox, use Options Applications Use Acrobat for pdf instead. Infinitely better!

ab1
★
★
★
★
★
Jan 6, 2024
0

It isn't an app really. Most users have trouble to use it outside a web browser.

It will open most documents without significant problems... It takes tens of seconds to open a 20MB PDF file on a mid-range smartphone.

newbread
★
★
★
★
★
Dec 14, 2019
-1

fast, simple, many good features

What is Firefox PDF Viewer (PDF.js)?

PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within Mozilla Firefox icon Mozilla Firefox almost all PDF files found on the web without a plugin.

Also available for Google Chrome icon Google Chrome and Opera icon Opera

Official Links

AppStores & Other Links