QuillBot
A full writing suite covering paraphrasing, grammar, plagiarism and AI detection in one browser tool.
At a glance
Starts at
Free
Listed as free on the vendor's site.
Free tier
Yes
Platforms
Web, Chrome, macOS, Windows, iOS, Android
Best for
Students and professionals polishing everyday written work
Not for
Anyone needing every rewriting mode without a subscription
4.5 out of 5
Scored by a Toolio reviewer after real useOur verdict
QuillBot combines a paraphraser, grammar checker, plagiarism and AI detector, summarizer, translator and citation generator into a single Chrome extension used by millions. The free version covers the basics, while modes like Humanize and Creative rewriting sit behind Premium. For everyday grammar fixes and paraphrasing it needs no upgrade, but heavier academic or professional use will likely hit the paywall.
βWhat it does well
All-in-one suiteBundles paraphrasing, grammar checking, summarizing and citation tools in one place.
Wide adoptionUsed by millions of people, with a 4.7 out of 5 rating on its Chrome listing.
AI and plagiarism checksFlags AI-generated text and plagiarism before you submit or publish work.
βWhere it falls short
Premium-gated modesAdvanced modes like Humanize and Creative rewriting require a Premium subscription.
Free tier limitsFree usage of tools like paraphrasing is capped compared to paid plans.
Rewriting still needs reviewParaphrased output still benefits from a manual pass before you rely on it.
Key features
ParaphraserRewrites sentences to change wording and tone.
Grammar checkerFlags grammar, spelling and punctuation errors as you write.
AI detectorChecks text for signs of AI generation.
Citation generatorFormats citations for papers and reports automatically.