Proofreading AI is an online AI proofreading tool that utilizes advanced language models like GPT-4/4o to proofread documents, providing precise results. This tool can correct grammatical errors, spelling mistakes, detect plagiarism, remove plagiarized content, identify AI-generated text, humanize AI text, generate citations, and rewrite text. The main advantages of Proofreading AI include seamless document uploads, instant downloads of corrected documents, and a variety of writing assistance tools. Its background information highlights that Proofreading AI offers more features than traditional proofreading tools at a relatively affordable price.