XTREME DOWNLOAD MANAGER (XDM)是一款开源免费的多线程下载工具，能下载保存自YouTube，Facebook，Google Video和其他1000多个网站的视频，软件由Java开发，支持Windows/Linux /Mac OS X系统，对于主流的浏览器如Chrome、Firefox、Edge…，提供了浏览器扩充套件，能够方便快速的撷取浏览器下载内容。
Due to issues on sourceforge, alternate binaries are available from github https://subhra74.github.io/xdm/#downloads
Latest source code available in github https://github.com/subhra74/xdm
Xtreme Download Manager is a powerful tool to increase download speed up-to 500%, save and convert streaming videos from YouTube, Vimeo, Dailymotion, Google Video and thousands of other websites, resume broken/dead downloads and schedule downloads.
XDM seamlessly integrates with Google Chrome, Mozilla Firefox Quantum, Opera, Vivaldi and many popular browsers, to take over downloads and saving streaming videos from web.
XDM has built in video converter which lets you convert downloaded videos to popular MP4 and MP3 formats.
Support for HTTP, HTTPS, FTP, DASH, HLS, HDS protocols, firewalls, proxy servers, PAC scripts, file redirects, cookies, authorization, download queue, scheduler and many more feature makes XDM a very useful tool
Download files at maximum possible speed. ( 5-6 times faster )
XDM can save video from YouTube, Dailymotion, Vimeo, Facebook and thousands of popular video sharing sites.
Works with all modern browsers on Windows, Linux and Mac OS X. XDM supports Google Chrome, Chromium, Firefox Quantum, Vivaldi, and many other popular browsers.
XDM has built in video converter, which lets you convert downloaded video to MP3 and MP4 formats
Supports HTTP, HTTPS, FTP as well as video streaming protocols like MPEG-DASH, Apple HLS, and Adobe HDS. XDM also supports Authentication,Proxy Servers, Cookies, Redirection etc.
Video download,clipboard monitoring, automatic antivirus checking,scheduler, system shutdown on download completion
Resumes broken/dead downloads caused by connection problem,power failure or session expiration
Works with Windows ISA, auto proxy scripts, proxy servers, NTLM, Kerberos authentication.