What is Quillbot? Is it cheating, and can AI detectors catch it?

Quillbot is an AI writing tool best known for its paraphraser: paste in a paragraph and it rewrites it in different words, at different levels of change. It also has a grammar checker, summarizer, citation generator, and its own AI detector. Students use it for honest reasons — fixing clunky sentences — and for one dishonest one: rewording a ChatGPT essay or a copied source so plagiarism and AI checkers don't flag it. Whether it's cheating depends on whose ideas went in.

What is Quillbot?

Quillbot is a browser-based writing assistant with a free tier and a paid Premium plan. The paraphraser offers modes like Standard, Fluency, Formal, and Creative, plus a slider for how much to change. There's a Chrome extension and a Google Docs add-on, so it works right where kids write. It's now owned by Course Hero's parent company, Learneo.

Is Quillbot cheating? It depends on what you paste in

• Usually fine: running your own draft through the grammar checker, or rephrasing one awkward sentence you wrote.
• Grey area: paraphrasing a source you then cite. Many teachers want students to paraphrase in their own words — check the class rules.
• Cheating: pasting a ChatGPT answer or someone else's essay into Quillbot so it reads as original. The ideas and structure aren't the student's, and the rewording exists only to hide that.

Suppose your child wrote, 'The character doesn't tell the truth because she is scared of losing her friend.' After editing, the sentence reads, 'The protagonist's dishonesty stems from apprehension about relational loss.' The idea may still be theirs, but the new wording creates a question worth asking: can they explain each word, and would they choose it themselves? They can keep the original sentence if it says what they mean more clearly. More formal doesn't automatically mean better.

Now imagine a source paragraph about pollution. Changing its vocabulary doesn't remove the need to credit the source, and it doesn't show your child worked out what the paragraph means. A useful practice is to close the source, explain the point aloud, and write a short note in their own words before checking it against the original. If the assignment requires independent paraphrasing, the child needs to do that work themselves under the teacher's rules.

Is Quillbot's AI detector accurate?

No AI detector is reliable enough to prove anything — including Quillbot's. Detectors guess from patterns like predictable word choice, so they flag honest writing by careful students and English learners, and they miss AI text that's been paraphrased (often by Quillbot itself). Treat any percentage as a reason to talk, never as evidence. Our guide to AI detectors covers why, and what teachers actually rely on instead.

What the app gives your kid vs. what you need to know

Paste the essay into our homework checker for a plain-language read on what sounds like your kid and what doesn't. If they're stuck on the assignment itself, explain my kid's homework walks through the prompt without writing it for them.

The 3 questions to ask tonight

• "What's the main point of this paragraph, in your own words?" A paraphrased essay is easy to read and hard to summarize if you didn't think it.
• "What does this word mean?" Quillbot loves swapping in vocabulary a kid wouldn't use. Pick one.
• "Where did this idea come from?" A writer remembers. A paster has to guess.

Keep an early draft beside the finished one for the conversation. Pick one change and ask why it was made. Suppose a sentence used to say the experiment 'proved' a claim, but now says it 'suggested' one. Ask what changed in the meaning. If your child can explain that the evidence was limited, the edit has become something they learned. If they only liked how the sentence sounded, it's an opportunity to examine the wording together.

The same approach works when an unfamiliar word appears. Ask for a simpler version of the sentence, not a dictionary performance. A nervous child may know the idea but struggle to define a word on demand. Give them time, or let them draw an example. One awkward answer isn't evidence that the whole essay came from somewhere else. You're trying to understand the writing process and the choices behind it.

If they admit the starting draft wasn't theirs, work backward to the missing thinking. Perhaps the essay prompt asked for a comparison and they didn't understand what to compare. Have them identify two details from the reading and explain how those details connect before rebuilding the paragraph. Replacing fancy words with simpler ones won't solve that gap; choosing the evidence and making the argument themselves will. Check the class policy before deciding what editing help belongs in the redo.

Banning it won't work — set the rule instead

Quillbot runs in any browser, and dozens of free paraphrasers do the same thing. Agree on the line instead: your ideas, your draft, then tools for polish only. Our one-page AI homework rulebook puts it in writing.