No, Using RewriteTool.net for paraphrase isn't cheating. Paraphrasing tools like RewriteTool.net are intended to assist users in rewording and rewriting text. If you're wondering whether paraphrasing is considered cheating or not, then the answer varies depending on many factors. However, to make sure that your paraphrase is ideal, you should cite the original source. That is to say, you should mention where you got the information from and make sure that the rewritten content is different from the original.