How accurate is it?
It reports a probability and works best on passages of a few hundred words or more. No AI detector is 100% accurate; short, formulaic or heavily edited text can be misread. Treat the score as a signal, not proof.
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Paste your text and click Detect to estimate how AI-like it sounds. Highlighted sentences are the ones most likely written by a model.
Your detection result will appear here
You’ll see an overall AI / human score and sentence highlights.
A few hundred words gives the most reliable read.
Get an AI score and a human score for the passage.
Sentences that read as AI-written are marked for you.
See which lines drive the score, not just a percentage.
AI likelihood and human likelihood, side by side.
Rework flagged lines in the Humanizer or Paraphraser.
Looks for patterns shared by ChatGPT, Gemini, Claude and others.
A probability, not a verdict — and we say so.
150 words a month, no card required.
It reports a probability and works best on passages of a few hundred words or more. No AI detector is 100% accurate; short, formulaic or heavily edited text can be misread. Treat the score as a signal, not proof.
It looks for statistical patterns shared by large language models rather than one product's fingerprint, so it applies to text from any of them.
Highlights mark the sentences most responsible for the AI score, so you know exactly what to revise.
By the words in the text you submit. All four tools share one monthly balance, and the remaining amount is shown before you click.
Yes. Free includes 150 words a month with no card and shows the first 150 words of every result. Student ($7.99/month) and Pro ($19.99/month) add more words and longer documents.
Your text is used only to produce your result. Kinzo does not sell personal data or share it for advertising. See the Privacy Policy for details.
Practical writing advice from the Kinzo team.
AI detectors do not know who wrote a sentence. They measure how predictable it is. Here is what that means, why short and formulaic text gets misread, why non-native writers are flagged unfairly, and how to read a score without over-trusting it.
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AI tools invent references that look real. Here is a quick, reliable routine for checking any citation before it goes in your bibliography — DOIs, titles, authors, page numbers and links — plus the red flags that give a fabricated source away.
4 min read
A humanizer that alters your facts is a liability. Here is what a good rewrite may touch, what it must leave alone, and how to check a humanized draft in a few seconds so nothing important slipped.
5 min read
Every tool shares your account and one monthly word pool.
Make AI drafts read like a person wrote them.
Restate any passage in fresh wording, meaning intact.
Verified MLA, APA and Chicago citations for your essay.
Compare plans on the pricing page or read the help center.