QuillBot

QuillBot is one of the most popular AI writing tools in the world, known primarily for its paraphrasing engine that can rewrite text in multiple modes including Standard, Fluency, Formal, Simple, Creative, Expand, and Shorten. This makes it invaluable for students, academics, and professionals who need to rephrase content while preserving meaning. Beyond paraphrasing, QuillBot includes a grammar checker, plagiarism detector, summarizer, and citation generator. The summarizer can condense long documents into key points or paragraph summaries, which is particularly useful for research. QuillBot integrates directly with Google Docs, Microsoft Word, and Chrome, letting you access its tools wherever you write. The free tier is generous enough for casual use, while the premium plan removes word limits and unlocks all paraphrasing modes.