Paste any text to get an instant AI-likelihood estimate with a full writing-pattern breakdown. Our free AI content detector checks burstiness, vocabulary diversity, and common AI giveaway phrases — right in your browser. Free, private, no signup.
Everything runs locally in your browser with JavaScript — your text is never uploaded, stored, or sent anywhere, so it is safe for unpublished drafts and private documents. The detector uses five heuristic signals: sentence-length burstiness, vocabulary diversity (type-token ratio), matches against a built-in list of about 30 common AI giveaway phrases, repetitive sentence starters, and word rarity. The final score is a weighted blend of these signals. It is a pattern estimate, not a definitive authorship test.
Teachers, editors, and recruiters use AI detectors as a first-pass screen when reviewing submissions — a quick way to spot writing that deserves a closer look. Bloggers and content buyers use it to sanity-check freelance work. But be honest about its limits: skilled human editing, paraphrasing, or simply formal writing can all shift the score, and no detector — free or paid — is 100% accurate. Use the breakdown to start a conversation, not to end one.
It is an estimate, not a verdict. The score reflects how closely the text matches common AI writing patterns — uniform sentence lengths, repetitive vocabulary, and giveaway phrases. Heavily edited AI text can score as human, and formal human writing can score as AI-like. No detector is 100% accurate, including this one.
No. The entire analysis runs in your browser with JavaScript. Your text never leaves your device, so it is safe for unpublished drafts, student work, and private documents.
The tool measures five signals: burstiness (how much sentence lengths vary), vocabulary diversity (type-token ratio), hits from a built-in list of about 30 AI giveaway phrases, how often sentences start with the same words, and word rarity (share of uncommon words). Each signal scores 0–100 for AI-likeness, and the final score is a weighted blend.
At least 50 words — below that there is not enough pattern to measure. For the most meaningful estimate, paste 150 words or more.
Yes. Light human editing, paraphrasing tools, or prompting an AI to write informally with varied sentences can all lower the score. That is why this tool should never be used as the sole proof in academic or disciplinary decisions.