Quick Case Converter
Free Online Case Converter, AI Text Tools & Utilities in One Place
Quick Case Converter
Free Online Case Converter, AI Text Tools & Utilities in One Place
Not sure if a piece of text was written by AI or a human? Our free online AI text checker gives you an instant answer. Paste any article, essay, email, social media post, or report — click Analyse Text — and get a live AI Tone score and Human Tone score in seconds. Everything runs privately in your browser. Your text is never uploaded to any server.
The detector analyses your text against two sets of signals simultaneously. AI signals include 40+ overused AI phrases ("in conclusion", "furthermore", "it is worth noting", "leverage", "robust", "cutting-edge", "delve into", "it is worth noting", "as previously mentioned"), unnaturally uniform sentence length, low vocabulary variety (type-token ratio), and heavy use of passive voice patterns. Human signals include natural contractions (can't, won't, I'm), casual or informal language (honestly, basically, kinda, by the way), personal pronouns (I, we, you, me), direct questions, exclamations, and varied sentence rhythm.
Both signal sets are scanned simultaneously. Each detected signal adds to its respective score. The two raw scores are then normalized against each other to produce complementary percentages that always add to 100%. A score of 70%+ AI Tone strongly suggests AI-generated content. A score of 30–69% AI Tone suggests mixed or AI-assisted content. Under 30% AI Tone suggests human-written content. Borderline scores are common for heavily edited AI text or for structured human writers who write formally.
Yes. The AI Text Checker detects writing patterns associated with all major large language models — not just one specific tool. It works on any AI-generated text regardless of which model produced it, because all major AI models share the same core writing patterns: formulaic phrasing, uniform sentence structure, and formal vocabulary.
After checking your text, use the Open in AI buttons below the tool to send it directly to an AI for rewriting, summarising, or editing. Each click copies your text to the clipboard and opens the AI — so whether or not auto-fill works, your text is always ready to paste with Ctrl+V / ⌘V.
All analysis runs entirely in your browser using JavaScript. Your text is never sent to any server, never stored, and never shared with anyone. Accuracy is highest with 100+ words. Short texts (under 20 words) may produce unreliable results. No AI detector is 100% accurate — use this as a guide, especially for borderline results around 45–55%.