QuillBot
The most used paraphraser. Modes for fluency, formality, simplification, expansion and shortening, plus a grammar checker, summarizer and citation generator.
What it is
QuillBot is the paraphraser most people mean when they say paraphraser. Its modes range from light fluency fixes to full restructuring, and it bundles a grammar checker, summarizer, translator and citation generator for students. The free tier caps each paraphrase at 125 words with no daily limit. It is also, by volume, the rewriter most often involved in the detection arms race, which is why universities mention it by name in integrity policies.
When to use this entry
Use this entry for the mainstream paraphraser and for policy questions that name QuillBot.
Questions
Is QuillBot free?
Yes with a 125-word cap per paraphrase and limited modes; Premium removes the caps.
Does using QuillBot count as AI writing?
Policies differ. Many institutions treat heavy paraphrasing of generated text as the same offence as submitting it; light rewording of your own draft is usually allowed.