An AI detector that shows its work.
Find out whether your text reads as AI-generated, which sentences raised the score, and why — in seconds.
Unlimited on every plan, including Free.Polycystic ovary syndrome affects a substantial share of women of reproductive age, yet the criteria used to diagnose it remain contested. It is important to note that the heterogeneity of PCOS presents significant challenges for researchers and clinicians alike. Most studies relied on the Rotterdam criteria. This review synthesizes current evidence on diagnostic approaches.
More than a percentage.
Overall AI score
One clear probability with a human / AI split, so you know where the draft stands.
Sentence highlights
Passages that raised the score are highlighted, with weak signals marked separately.
Why it was flagged
Click any highlight for the reason and a concrete suggestion for what to change.
Stock-phrase checks
Formulaic openers, stacked transitions and overused words are pointed out by name.
History
Recent checks are kept in your browser so you can come back and compare drafts.
One click to rewrite
Send flagged text straight to the Humanizer when you want to revise it.
How our AI detector decides.
Every result combines a document score, per-sentence scores and pattern checks. You see all of them, not just the total.
A trained classifier
A transformer model fine-tuned on large sets of human and AI-written text. Not a chatbot asked to guess.
Sentence by sentence
Each sentence is scored with its neighbours for context, so you see where the signal comes from.
The whole document
Long texts are scored in overlapping sections and combined into one overall probability.
Writing patterns
Stock phrases, filler transitions and overused words are flagged by name, with what to write instead.
When to be careful with a score.
No detector is perfect, ours included. Results are less reliable in some situations, and a score should never be used on its own to accuse anyone. Read more in how AI detectors work.
Check before you publish, submit or send.
Bloggers & content writers
Edit AI-assisted drafts so articles read like you wrote them, before they go live.
Academics & researchers
Check papers and reports, and keep technical terms, citations and figures untouched.
Professionals
Polish emails, proposals and reports into clear, confident language in the tone you need.
Personal use
Cover letters, applications, personal statements: make everyday writing sound like you.
Want to fix what was flagged? The AI Humanizer rewrites it into natural language.
Is the AI Detector really free?
Yes. AI detection is unlimited on every plan, including Free. You only need a free account.
How accurate is it?
Detection is probabilistic and no tool is always right. That’s why we show the flagged sentences and the reasons behind every score. See our Disclaimer.
Which languages are supported?
English. Results on other languages are not reliable yet.
How much text can I check at once?
Up to 10,000 characters per check on Free, and 50,000 characters on paid plans. Longer documents are scored in overlapping sections.
Can I use a score to prove someone used AI?
No. A score is a signal to look closer, not evidence of authorship.