From MakeUseOf:
A software developer by the name of BlueEdge has developed an
interactive website
https://win11.blueedge.me/that allows Windows 11 to run in a browser. Simply visit the website, and when prompted to type in a login password, just press Enter to begin exploring Windows 11.
Unfortunately, the website only offers a demo of the basic features Microsoft has offered in Windows 11. The interactive website supports a few apps such as the Edge browser, Notepad, Terminal, Spotify, VScode, and the revamped Microsoft Store. You can also check out the Start Menu and Search interface, even if it's not entirely functional.
It is important to note that this Windows 11 mock-up is available through your web browser, without any installation of any kind. This is not a virtual machine, and it is essentially developed to get you a decent idea about what Windows 11 will be like.
BlueEdge has developed the website on the React platform and has licensed it with Creative Commons. It will be interesting to see if Microsoft will strike down BlueEdge’s website for copyright infringement. Either way, BlueEdge plans to add more features to the Windows 11 demo website; these include the redesigned File Explorer and maybe even the Settings app.