Does your chapter read machine-written?
Paste a scene or chapter. You will see which sentences a reader, reviewer or retailer is likely to find machine-written, highlighted in your own text, with the reason and a practical fix for each.
What this checker looks for
It reads your passage the way an experienced line editor would and flags the habits that large language models lean on: sentences of near-identical length and shape, stock phrases such as “a testament to” or “a wave of relief washed over her”, feelings named outright when the action already shows them, paragraphs that end by summarising themselves, reflexive lists of three, and dialogue that states its own subtext.
Can any tool prove a book was written by AI?
No. Every detector, this one included, measures how a text reads, not who wrote it. Careful human writers sometimes produce these patterns, and well-edited AI-assisted prose often does not. That is why you get a confidence level and specific sentences to judge for yourself, rather than a percentage presented as fact. Short passages always get a low-confidence result.
Why it matters for self-published authors
Readers notice these patterns, and reviews that say a book “feels like ChatGPT” hurt sales whether or not AI was involved. Fixing the flagged sentences makes the prose better either way. For the wider picture, including how retailers treat AI-assisted books, read our guide to AI-written book checkers.
