I was wondering if there is a platform or a tool that can flag papers for being plagiarised? Brief: let's say I am researching on topic X and have used Y as a reference paper. But while through the process of researching I find there are few papers published under similar topics. Or to say with the same research work as what is in Y. And I am a independent researcher just listing/downloading papers related to X. So is there a website on which I can just upload these plagiarised articles/papers and flag it? We do have plagiarism checkers but all I want to know is if there exists one such tool where anyone from anywhere can upload a plagiarised paper.
I would worry that a web site that lets anyone charge plagiarism of specific work would be in for a lot of lawsuits unless there was a mechanism for actually verifying the charge.
Charging plagiarism is a very serious action. You'd better be sure before you make a public charge. It could be interpreted in some places as libel, a form of defamation. At a minimum it would cause an uproar.
I don't think many organizations would be brave/foolish enough to host such a site.
If you think something is plagiarized, then work through existing academic structures to correct it. Also, be aware that you might be entirely wrong. Parallel (independent) work, especially in popular research areas, is very common.