What’s the Best Tool for Checking Spelling, Grammar, and Plagiarism? Here is a list of the best online grammar and plagiarism tools for checking your writing. That’s why it is incredibly important to take a little extra time to investigate the text to ensure it free from error and completely unique. Hiring an outside writer from a website such as Fiverr is a great way to create great content without exerting an overabundance of effort, but not every freelancer is honest. Anyone who has passed a high school English class can tell you two things-writing is tough and plagiarism is wrong.