Free AI detector for essays and papers
Paste any passage for one canonical AI-likelihood estimate — no account, no cost. Treat it as a review signal, then revise if needed.
Your AI-likelihood score will appear here.
AI detectors give a probability, not a verdict. Results are an estimate and can be wrong — use them as guidance, not proof.
How the free AI detector works
Three steps, no account needed to try it.
Paste your text
Drop in an essay, abstract or paragraph. Nothing is saved to your account — you don't even need one.
Get an AI-likelihood score
One canonical model returns an AI-likelihood estimate with a plain-English risk read-out.
Humanize in one click
If the score is high, send the text straight to the Humanizer to rewrite it in a more natural, academic voice.
About this AI detector
AI writing detectors estimate the likelihood that a passage was produced by a large language model such as ChatGPT. They analyze patterns in word choice, sentence rhythm and predictability that tend to differ between human and machine-generated text. Because they are statistical models, they return a probability — never a certainty — and every serious detector, including this one, can produce false positives and false negatives.
This free tool is built for students, researchers and educators who want a quick, no-friction way to check a draft before it matters. There's no sign-up and no cost for a few checks a day. Paste your essay, abstract or paragraph, and one canonical model returns an AI-likelihood percentage plus a low, medium or high risk band so you can decide what to do next.
The most useful part isn't the score on its own — it's what you do with it. If a passage reads as strongly AI-generated, the one-click "Humanize this" button hands your text to the BunnyScholar Humanizer, which rewrites it for a more natural, human academic voice while preserving your meaning, citations and terminology. Detect, then improve, without switching tools.
A responsible note on how to use any detector: never treat a score as proof. Genuine human writing — especially clear, formulaic or non-native English — can score as AI, and lightly edited AI text can score as human. Use detection as a prompt to review and strengthen your own writing, not as a substitute for judgment. For higher daily limits and the full academic toolkit — humanizer, translator, writer, LaTeX and citation tools — you can create a free account any time.
Frequently asked questions
Is this AI detector really free?+
Yes. You can run a few AI-detection checks per day with no account and no payment. If you need higher daily limits, creating a free account unlocks more, and paid plans add the full academic toolkit.
Do I need to sign up or log in?+
No. The free detector works without an account. You only need to sign up if you want more daily checks or the humanizer, translator and other tools.
How accurate is the AI detector?+
The canonical model returns one statistical likelihood, not a verdict. No detector on the market is perfectly accurate — all of them produce false positives and false negatives. Treat the score as guidance and always apply your own judgment.
Can it detect ChatGPT, Gemini and Claude?+
It's trained to flag text that reads like modern large language models in general, including popular assistants. Because models change quickly, results are an estimate rather than a guarantee.
Is my text stored?+
The free detector analyzes your text to return a score and does not tie it to an account. See our Privacy Policy for full details on how data is handled.
What does 'Humanize this' do?+
It sends your analyzed text to the BunnyScholar Humanizer, which rewrites it in a more natural, human academic voice while keeping your meaning, citations and key terms intact.