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DownZemAll! is a rewrite of the legacy software DownThemAll! which was an extension for Mozilla Firefox, but whose development stopped around 2016, when Mozilla Firefox migrated to WebExtensions.

DownZemAll! is a standalone download manager for Windows, MacOS and Linux.

It aims to work with latest versions of Mozilla Firefox (powered by WebExtensions), and other web browsers (Chrome, Edge, Safari...).

DownZemAll! is written in C++ and based on the Qt5 framework.

Built with Qt


Video Streams

Video Download

Webpage Content


Batch of Files


More screenshots on the Gallery page.


Go to Download page to install the application for your operating system.

Rem: Native-Client is an alternative to DownRightNow. Click here for more information.


Go to Tutorial page.

Under the hood

DownZemAll! is a standalone application, embedding its own web engine. That is, it aims to be free and independent, and not rely on any third-party Web Browser technology.

The internal web engine is currently:

  • Google Gumbo Parser, for the MinGW and GNU versions.

    Gumbo is a small pure-C HTML5 parser (but doesn't parse Javascript)

  • Chromium, for the MSVC version.

    Chromium is a powerful web engine (parses HTML+Javascript)

When we give an URL address to DownZemAll!, DownZemAll! downloads the page, parses the HTML page and collects the links.

Due to rapid evolution of web technology, DownZemAll! is designed to implement new parsers or add existing ones if required.


Click here for build instructions.


Click here for translator guide.

License and Disclaimer

The code is released under the GNU Lesser General Public License (LGPL).

Use it at your own risk. None of the authors, contributors, or anyone else connected with this DownZemAll software and the DownRightNow web-extension, in any way whatsoever, can be responsible for your use of the application.

Please be aware that this site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner.

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