What is the best free tool to use for detecting duplicate content from different

[Andrey]

To detect duplicate content in websites and blogs, free tools like Copyscape , Duplichecker and plagiarism theft checkers by Grammarly are very helpful. These tools will help highlight the same content  so that you can avoid the issues of plagiarism. This is important for SEO because search engines kick against duplicate materials.  Do you think duplicate content is always harmful, or can it help sometimes when referring to popular ideas?