
Sumatra PDF
Okular
Evince
MuPDF
Adobe Reader
Adobe Acrobat DC
PSPDFKit
PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that...

Which is more popular?
Based on our record, Firefox PDF Viewer (PDF.js) seems to be more popular. It has been mentioned 35 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mozilla.github.io | codegres.org |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
The Firefox PDF Viewer is recommended for users who require a reliable and fast way to view PDFs within their browser, particularly those who prefer open-source solutions. It is ideal for users who do not want to install standalone PDF software or plugins and those who value seamless integration within their web browsing experience. It is also suitable for developers and contributors interested in web-based document viewing technologies.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Firefox PDF Viewer (PDF.js) and Codegres.org. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


• Dependency on PDF.js: It uses PDF.js under the hood, and any vulnerabilities discovered in PDF.js will impact react-pdf as well.
We have no reviews of Codegres.org yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


I think in case of Firefox it's done purely with JS (https://mozilla.github.io/pdf.js/), no native code. So that feels fine (assuming it runs in same sandbox like any page), just bundled HTML/JS being changed. - Source: Hacker News / about 2 months ago
Pdfcevir does everything in the browser using pdf-lib and pdf.js. No file ever leaves your device. There's no backend processing the PDF — the JavaScript running in your tab does all the work. - Source: dev.to / 2 months ago
Pdf.js — read text, positions, fonts, colours, and the operator list. - Source: dev.to / 3 months ago
Tracking Codegres.org since Nov 2022.
When comparing Firefox PDF Viewer (PDF.js) and Codegres.org, you can also consider the following products.

Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
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Okular is a universal document viewer based developed by KDE.
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Evince is a document viewer for multiple document formats: PDF, Postscript, djvu, tiff, dvi, XPS...
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MuPDF is a lightweight PDF and XPS viewer.
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Adobe Acrobat Reader is a free tool for viewing documents that have been stored in Adobe's Portable Document Format (PDF).
Compare Adobe Reader to Firefox PDF Viewer (PDF.js) or Codegres.org:

Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Compare Adobe Acrobat DC to Firefox PDF Viewer (PDF.js) or Codegres.org: