Free AI Text Detector — Analyze Text for AI-Generated Patterns
As AI-generated content becomes more prevalent, the ability to distinguish between human and machine-written text is increasingly important. Our free AI Text Detector uses advanced heuristic analysis to evaluate writing patterns and provide an estimate of whether a given text was likely written by a human or generated by an AI language model such as ChatGPT, Claude, or Gemini.
The tool examines ten distinct linguistic features: sentence length uniformity, vocabulary diversity (type-token ratio), transition word frequency, passive voice usage, average word length consistency, paragraph structure consistency, repetitive sentence starters, hedging language patterns, burstiness (variation in sentence complexity), and a perplexity estimate based on word predictability. Each metric is scored independently and combined into a weighted overall probability score.
AI-generated text tends to exhibit certain telltale patterns: sentences of remarkably uniform length, overuse of transition words like "however" and "moreover," formulaic phrases such as "it is important to note," and consistent paragraph structures. Human writing, by contrast, naturally varies in sentence length, uses more diverse vocabulary, and displays greater "burstiness" — alternating between simple and complex sentences.
This tool runs entirely in your browser with no data sent to any server, ensuring complete privacy. While heuristic analysis cannot match the accuracy of deep learning models trained on millions of examples, it provides a useful first-pass indicator. Use it to screen content, flag potentially AI-generated submissions, or simply explore how your own writing compares to typical AI output patterns.