WebPagetest is a web-based application for testing and analyzing the performance of websites. It was developed by Patrick Meenan and is an open source project. The application allows developers to measure the performance of their websites from multiple locations around the world and provides detailed analysis of the results. It also allows developers to compare their websites to competitors' and identify opportunities for improvement. WebPagetest can help developers ensure that their websites are loading quickly and efficiently, as well as resolving any issues that might be preventing their websites from performing optimally. It can be used to test websites on both desktop and mobile devices, making it a valuable tool for web developers of all skill levels.
It collects your email address and then sends it to http://airee.international/ for the real test, and that site is even worse for all the advertising it displays.
I use Calibre to monitor every site I work on. It runs every day automatically.
Discontinued No more site performance tests. Website unavailable.
Discontinued Now redirige a https://www.orbonline.co.uk/
The most relevant optimizations of all this kind of solution and a very easy to use user interface, I love this app :)