TwiDropper is a free web tool that allows you to download videos, GIFs and images from Twitter on your iPhone, Android or PC. You can choose whether to save the file to your device or Dropbox.
TwiDropper consists of three independent services (for tweets, for users, and for DMs). Please select one from the tabs at the top.
It is prohibited by Japanese law to download videos which have been uploaded without the permission of the copyright holder. Do not engage in illegal downloading.