Updated on September 8, 2026
QuillBot AI Humanizer is a feature of the QuillBot writing suite that rewrites AI-generated text until it reads like a person wrote it. Five languages are covered, French, Spanish, German and Brazilian Portuguese alongside four English dialects, which few rivals can claim. Each free pass takes 125 words, capped at six rewrites a day, and Premium comes to $8.33 a month on the yearly plan. Students, bloggers and marketing teams run their ChatGPT drafts through it to strip out the mechanical feel.
The AI Humanizer hunts down the telltale habits of language models, same-length sentences, puffed-up phrasing, generic word choices, then rewords everything while keeping the meaning intact. You paste a paragraph from ChatGPT, hit Humanize, and the edits light up in color in the output.
A human score comes with every result, and QuillBot itself warns that a high score is a good sign but chasing a perfect 100 percent is not always meaningful, so treat it as one input among several. And if you draft inside ChatGPT or Gemini, QuillBot's Chrome extension humanizes text without leaving the window, a real time-saver when your drafts come from AI text generators.
No humanizer guarantees a zero score on GPTZero, Turnitin or ZeroGPT, and QuillBot's is no exception. User-run tests show detection-score drops that vary widely from one detector to the next, rarely enough to clear Turnitin on heavily generated text. QuillBot itself frames the feature as a tone and readability tool rather than a detector-dodging machine.
Services like Undetectable AI, BypassGPT or Clever AI Humanizer go after scores first, while the Humanizer favors faithfulness to your meaning, a distinction worth keeping in mind while browsing AI detection tools. Three habits make the result stronger.
The free tier tops out at 125 words per pass and six passes a day, 750 words in total, with quick rewrites and limited score insights. Premium removes those ceilings, moves to deeper rewrites with full history and insights, and opens the full suite, Paraphraser, grammar checker, plagiarism checker and AI detector included.
Count on $8.33 a month on the annual plan, a little under $100 for the year, while the month-to-month option costs roughly twice as much, QuillBot advertising 58 percent off for paying annually (worth knowing before you pull out the card). These figures shift with promotions, so QuillBot's own pricing page has the final word.
| Feature | Free | Premium |
|---|---|---|
| Words per pass | 125 | Cap removed |
| Passes per day | 6 | Unlimited |
| Rewrite depth | Quick | Deeper |
| Human score and history | Limited insights, no history | Full insights and history |
| Rest of the QuillBot suite | Partial access | Full access |
Yes, up to 125 words per pass and six rewrites a day once you sign in, no card required. Longer texts have to be split into chunks, or you upgrade to Premium, which lifts the caps and unlocks the deeper rewrites.
Partly. User reviews report detection-score drops that vary a lot from one detector to another, yet fully generated essays still get flagged by Turnitin or GPTZero on a regular basis. The tool aims at readable, natural prose first, so a human read-through remains your best safety net.
Undetectable AI chases one main goal, pushing detector scores down, with a heavier rewrite style. QuillBot's Humanizer stays closer to your original meaning and comes bundled with a full writing suite, grammar, paraphrasing and plagiarism checks. For text meant to be read by actual people, the QuillBot route ages better.
Five languages are on the list, English with four dialect options (US, UK, Australian, Canadian), plus French, Spanish, German and Brazilian Portuguese. A language tab at the top of the tool switches between them, and QuillBot's wider Paraphraser goes further still, with over twenty languages covered.
Verdict: A few seconds per paragraph is all it asks, and the payoff lands squarely with students, bloggers and marketing teams already working inside the QuillBot suite, French speakers included.
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