Low AI-like signals
Few meaningful pattern clusters appear, or contextual variation outweighs the positive evidence. This does not prove human authorship.
AI Detector
Analyze writing for patterns often associated with AI-generated text—without pretending the result proves authorship.
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Paste or type text to analyze.
What this analyzer checks
Patterns you can inspect
Phrasivo measures sentence rhythm, repeated openings, transition use, formulaic and generic phrasing, multi-word repetition, vocabulary variation, structural regularity, and paragraph rhythm. It also considers contextual countersignals such as concrete details, quotations, contractions, and varied writing forms.
- 1Paste textAdd a few complete sentences or a longer document.
- 2Analyze patternsDeterministic local rules extract independent, explainable signals.
- 3Review in contextRead the evidence and limitations; do not treat the level as proof.
Reading the result
What the signal levels mean
Moderate AI-like signals
Meaningful pattern evidence exists, but it is incomplete, mixed, or substantially counterbalanced.
High AI-like signals
Multiple independent strong signal families accumulate with limited contradictory evidence. This still does not prove AI authorship.
Why detection is imperfect
Writing style is not authorship
Human writing can be polished, repetitive, or formulaic. Generated writing can be specific, irregular, and personal. A surface-pattern analyzer cannot see drafts, intent, editing history, or who typed the words.
Use evidence fairly
Review sources, drafts, assignment context, domain conventions, and the writer’s explanation. Do not use an automated result alone for academic, employment, disciplinary, or other high-stakes decisions.
Straight answers
AI Detector questions
Clear limits for an uncertain task.
What does Phrasivo AI Detector analyze?
It checks explainable patterns including sentence variation, repeated openings, transition density, formulaic language, phrase repetition, vocabulary variation, structural regularity, paragraph rhythm, and generic framing.
Can an AI detector be 100% accurate?
No. AI detection is probabilistic and imperfect. Human writing can trigger AI-like signals, and AI-generated writing can appear human.
Does a High result prove AI wrote the text?
No. It means several independent patterns resemble highly structured, templated, or generated prose. Results are indicators, not proof of authorship.
Can human writing trigger AI-like signals?
Yes. Formal, academic, technical, concise, or template-based human writing may show the same patterns. Context matters.
Is my text stored?
No. Analysis runs entirely in browser JavaScript. Your text is not sent to PHP, a database, analytics, an external API, or a third party.
Is there a word limit?
Phrasivo imposes no artificial maximum. Your device still has practical limits, and very short samples may not contain enough patterns for a meaningful assessment.
Can this detect ChatGPT specifically?
No. Surface writing patterns cannot reliably identify a specific model or guarantee ChatGPT detection.
Should AI detection be used for disciplinary decisions?
Not by itself. Never use this or another detector as the sole basis for academic, employment, disciplinary, or other high-stakes decisions. Review context, drafts, sources, and the writer’s explanation.