Detector AI

Detector AI is a free web tool that analyzes text to determine if it was written by a human or generated by an AI like ChatGPT, Gemini, or Claude. You simply paste your text into a box, and it scans the content, highlighting sentences in different colors to show what it believes is completely AI-generated, partially AI, or fully human-written. The goal is to provide a clear, visual assessment of a text's origin without requiring any account creation or payment.

The tool works by using natural language processing (NLP) and machine learning algorithms trained on diverse datasets of both human and AI-generated writing. It analyzes text at the sentence level, looking for patterns typical of major language models. Detector AI emphasizes its ease of use—it's completely free, has no word limits, and returns results within seconds. The site claims its model was recently updated for better speed and accuracy.

This tool is most useful for educators who need to verify student work, content creators who want to ensure their blogs are human-written for search engine ranking, and professionals like recruiters screening cover letters or assessments. It addresses a growing need to identify AI-assisted content quickly and transparently, though the site itself cautions that no such tool can be 100% reliable for high-stakes decisions.