One approach could be to “View Source” of the page in a browser and look for “mxui”. This is the JavaScript library that a website built in Mendix uses. If it exists, it’s almost certainly a Mendix application.
Hope this helps.
Hi Laxman,
You can use https://marketplace.mendix.com/link/component/120888 .Its a custom Mendix dev tool Chrome extension , I found it very useful.
Cheers.