How Pearto AI Humanizer works
The workspace has two panes and one inspector. You write or paste into the original pane; analysis runs over that text and reports measured signals rather than a single score. When you ask for a rewrite, Pearto extracts the meaning, locks everything that must not move, rewrites the sentences that have a specific problem, and then checks its own candidate against the original. If a candidate would change a number, a name, a citation, a quotation or a negation, that sentence is reverted instead of published.
The engine version that produced a result is recorded with it (1.0.0),
so a later engine can be compared against an earlier judgement instead of quietly
contradicting it.
What AI-likelihood means
AI-likelihood is an estimate based on writing patterns. It is not proof of authorship.
Pearto combines many independent signals: how much sentence length varies, how uniform paragraph lengths are, how often stock phrases and boilerplate appear, how much information a sentence actually carries, how repetitive the vocabulary is, and how formulaic the openings and conclusions are. No single word makes text look generated. Words like furthermore or crucial are counted as context among many other measurements and can never decide the result on their own.
Confidence scales with length. Below about fifty words Pearto reports that the sample is too short to judge. From fifty words it reports very low confidence, from one hundred and fifty limited confidence, and only above three hundred words normal confidence, because short samples genuinely do not contain enough signal.
Natural rewrite versus simple paraphrasing
A paraphraser swaps synonyms. That is not what happens here. Pearto targets the constructions that make prose read as machine-produced or careless: padded openers, empty transitions, filler phrases such as "due to the fact that", sentences that run long enough to lose their claim, and passages that repeat an idea already made. Where a sentence has no specific defect, it is left alone rather than churned for the sake of appearing busy.
Pearto never inserts typos, slang, bad grammar or invented personal experience to make writing look human. If personal reflection would strengthen a passage, the tool says so and leaves the writing to you.
How changes are tracked
Each rewrite produces structured change records. You can read the revised text clean, see changes marked inline, or open a full diff. Removed text is struck through and labelled; added text is highlighted and labelled; protected spans are marked with a lock. Colour is never the only cue. Individual changes can be accepted or rejected, and the revised text is rebuilt from your decisions.
Originality and source similarity
Pearto separates three things that are often confused: how a text was produced, whether it is similar to another text, and whether it is properly attributed. Similarity is measured locally with shingling, Jaccard overlap, MinHash sketches and fuzzy sequence matching. When online source search is enabled it queries configured open academic sources and retrieves archived copies of links found in your document.
Pearto never claims to have searched the entire internet, never scrapes search-engine result pages, and never reports a source it did not actually retrieve. If only bibliographic metadata matched, it says metadata match rather than text match. A passage with uncredited overlap is described as a potential uncited close match — not as plagiarism, which is a question of attribution and intent.
Frequently asked questions
What does AI-likelihood mean?
It is an estimate built from measurable writing patterns — sentence-length variation, repetition, stock phrasing, information density and similar signals. It is not proof that a person or a model wrote the text.
Can Pearto prove that text was written by AI?
No. AI-writing detection is probabilistic. Pearto evaluates multiple linguistic and structural signals and reports an estimate with a confidence level rather than claiming certainty.
How does the Humanizer work?
It reads the document, protects numbers, names, citations and quotations, then rewrites specific sentences to remove padding, stock phrasing and repetition. If a candidate would change a protected fact, the sentence is reverted rather than published.
Does Pearto intentionally add mistakes?
No. Pearto never inserts typos, bad grammar, slang or invented personal stories. Text is improved by tightening structure, rhythm and specificity, and every change is shown with a reason.
Does Pearto check plagiarism?
It measures similarity, which is not the same thing. Plagiarism is about attribution and intent; similarity is about shared words. Pearto reports overlap and whether a citation was present, and never labels a passage as plagiarised.
Does Pearto search the whole internet?
No, and it never claims to. Local analysis always runs. When online source search is enabled it queries configured open academic sources and retrieves archived copies of URLs found in your text. Private databases and much of the web are not covered.
Will my citations stay intact?
Yes. Citation patterns, DOIs, URLs, quotations, numbers and detected proper nouns are treated as protected spans. A rewrite that changes any of them is rejected.
Can I see what Pearto changed?
Every rewrite produces change records with the original text, the replacement, the reason, and a category. You can view a full diff, accept or reject changes individually, and see before-and-after scores.
Can I use Pearto without creating an account?
Yes. The full local analysis and rewrite work without an account, and your draft is kept in your own browser. Signing in adds saved documents and version history.