Retest allows you to check your incredible design, user experience, program flow, functionality, and page layout in 2 simple steps, on multiple mobile devices, tablets, and computers, without even buying any of those, so that every time your customer visits your webpage, they feel what you want them to feel with your design irrespective of their device.
We certainly respect the data privacy and security of all the webpages out there, and in no way, we intend to bypass that, so websites other than yours with any such added security features will not work on our platform.
P.S:- This is to test your website and not sneak into others
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
Ghost Inspector - Easily create automated browser tests for your websites and web apps. Ensure everything works and looks the way it should. No coding required. 14 day free trial!
Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.
browserling - Live interactive cross-browser testing from your browser.
Browsershots - Browsershots makes screenshots of your web design in different browsers.
UserTest.io - User testing made simple. High-quality, affordable user testing solutions from real users, here in the UK. Improve your usability!