AI Content Detector — Free Text Analysis

About AI Content Detector

This tool uses statistical analysis to identify patterns commonly associated with AI-generated text. It measures perplexity (how predictable the word choices are), burstiness (variation in sentence length), vocabulary diversity, and repetition patterns.

Important: This is a statistical analyzer, not a definitive AI detector. Results indicate statistical patterns only. Human writing can show AI-like patterns, and AI-generated text can mimic human patterns. Use this as one data point among many.

Statistical detection methods measure properties like perplexity — how surprised a language model is by each word choice. AI-generated text typically has lower perplexity because language models select statistically likely words. Human writing tends toward higher perplexity because people choose unexpected words, use idioms, and make deliberate stylistic choices.

Detection accuracy has inherent limitations. Lightly edited AI text often evades detection, while formulaic human writing (legal documents, technical manuals, press releases) frequently triggers false positives. No detection tool should be used as the sole basis for academic integrity decisions or content policy enforcement.

This analyzer provides raw statistical metrics rather than a binary AI-or-human verdict. You see the actual perplexity distribution, burstiness score, vocabulary diversity ratio, and repetition patterns. This transparency lets you form your own judgment rather than relying on an opaque confidence percentage. Use it alongside the AI Text Analyzer for the most comprehensive view.