Students checking a draft
See whether a literature review has fallen into repeated openers, stock transitions, and evenly sized sentences before you submit it.
Estimate, not a verdict
Free AI Detector
Paste a passage and see which parts resemble common AI writing patterns. The score is an estimate you can use while revising — it is not proof of who wrote the text.
Check a passage
Uses your word credits. The result is an estimate, not proof of authorship.
0 / 500 words
Checking your words…
How it works
01
Paste a passage
The checker works best on at least a short paragraph. A few hundred words give the estimate more pattern to read than a single sentence.
02
Read the estimate
You get a 0–100 score, a plain-language summary, and highlights for passages that look more or less like typical AI prose.
03
Revise with that context
Use the highlights as editing notes. If the draft also needs a field-specific voice, the humanizer is the next step — not a claim that the score was wrong or right.
When to use it
Editors reviewing a contributor
Flag sections that may need a human pass for voice, without treating the score as an authorship ruling.
Writers comparing revisions
Run an early draft and a later one to see whether the writing has picked up more specific detail and varied rhythm.
Limits and accuracy
- Results are stylistic estimates. They are not proof that a person or a model wrote the text.
- Human writing can score high when it is formulaic, heavily edited, or written in a second language. AI-assisted writing can score low after a careful rewrite.
- Short samples are less reliable than a few paragraphs.
- The detector uses the same word credits as the humanizer. Sign in, and each check spends the words you paste.
Examples
A generic policy paragraph
A passage built from “it is important to note,” “furthermore,” and “in conclusion” often lands toward the AI-like end of the scale, because those patterns are common in model output. That still does not prove a model wrote it.
A specific lab note
A note that names the bench, the time, an unexpected smell, and an uneven sentence or two often lands lower. Concrete detail and uneven rhythm are harder for a style score to call “typical AI.”
Questions about this tool
No. The score estimates how close the style is to common AI prose. Detection systems produce false positives, especially on human writing that is formal, repetitive, or written by someone who is not using their first language.
Want the writing to sound more like you?
A detector score does not rewrite anything. Refinely Human is the field-specific humanizer — 25 audience profiles, academic tone levels, and 300 words free when you create an account.