Response is an open-source responsiveness testing tool

Response is a useful tool to test Web pages responsiveness

Response is a free, open-source lightweight program built for developers to test their web pages against several screens.

You can use it to test any live page responsiveness or against your local development pages.

It is built using Vala for Linux systems, and it is available as a Flatpak package on Flathub, and as a Deb package for Debian and Ubuntu -based distros.


  • Minimal UI 🎨️.
  • Low resource consumption 🍰️.
  • Single Tab based Configuration