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PDF Reader in JavaScript
JavaScript CSS HTML
Latest commit acf74d4 @timvandermeij timvandermeij Merge pull request #6941 from Rob--W/crx-allow-pdf-in-local-frames
Allow local PDF files to be viewed in local frames
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docs Clean up npm dependencies and add `license` property
examples Use RequireJS in the viewer, examples and tests.
extensions Allow local PDF files to be viewed in local frames
external Adds UMD header to pdf.js and pdf.worker.js files.
l10n Import l10n.
src Replace `getAll` with `getKeys` in `PartialEvaluator_hasBlendModes` t…
test Replace `getAll` with `getKeys` in `PartialEvaluator_hasBlendModes` t…
web Allow local PDF files to be viewed in local frames
.editorconfig Uses editorconfig to maintain consistent coding styles
.gitattributes Fixing C++,PHP and Pascal presence in the repo
.gitignore Added svg export tool
.gitmodules Update fonttools location and version (issue 6223)
.jshintignore Remove mozcentral test files.
.jshintrc Adds UMD headers to core, display and shared files.
.travis.yml Update the Node.js version used by Travis, to prevent deprecation war…
AUTHORS Adding to authors Clarify bug reporting with regards to providing a pdf
LICENSE cleaned whitespace Update to add Seamonkey compatibility
make.js Adds pdfjs/main_loader module to better mirror pdfjs-dist/build/pdf.
package.json Use RequireJS in the viewer, examples and tests.
pdfjs.config Publish 1.4.20


PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5.

PDF.js is community-driven and supported by Mozilla Labs. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.


PDF.js is an open source project and always looking for more contributors. To get involved checkout:

For further questions or guidance feel free to stop by #pdfjs on

Getting Started

Online demo

Browser Extensions

Firefox and Seamonkey

PDF.js is built into version 19+ of Firefox, however the extension is still available:

  • Development Version - This version is updated every time new code is merged into the PDF.js codebase. This should be quite stable but still might break from time to time. This version is also reported to work when installed as extension in Seamonkey 2.39.

Chrome and Opera

  • The official extension for Chrome can be installed from the Chrome Web Store. This extension is maintained by @Rob--W.
  • Opera has also published an extension for their browser at the Opera add-ons catalog.
  • Build Your Own - Get the code as explained below and issue node make chromium. Then open Chrome, go to Tools > Extension and load the (unpackaged) extension from the directory build/chromium.

Getting the Code

To get a local copy of the current code, clone it using git:

$ git clone git://
$ cd pdf.js

Next, install Node.js via the official package or via nvm. If everything worked out, run

$ npm install

to install all dependencies for PDF.js.

Finally you need to start a local web server as some browsers do not allow opening PDF files using a file:// URL. Run

$ node make server

and then you can open

  • http://localhost:8888/web/viewer.html

It is also possible to view all test PDF files on the right side by opening

  • http://localhost:8888/test/pdfs/?frame

Building PDF.js

In order to bundle all src/ files into two productions scripts and build the generic viewer, issue:

$ node make generic

This will generate pdf.js and pdf.worker.js in the build/generic/build/ directory. Both scripts are needed but only pdf.js needs to be included since pdf.worker.js will be loaded by pdf.js. If you want to support more browsers than Firefox you'll also need to include compatibility.js from build/generic/web/. The PDF.js files are large and should be minified for production.


You can play with the PDF.js API directly from your browser through the live demos below:

The repo contains a hello world example that you can run locally:

For an introduction to the PDF.js code, check out the presentation by our contributor Julian Viereck:

You can read more about PDF.js here:

Even more learning resources can be found at:


Check out our FAQs and get answers to common questions:

Talk to us on IRC:

  • #pdfjs on

Join our mailing list:

Subscribe either using or Google Groups:

Follow us on twitter: @pdfjs

Weekly Public Meetings

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