AI コンテンツ検出機

開発者安全文章

入力

クレジットの使用

出力

AI搭載サーバー側

財産	結果
Verdict
Confidence Score
Characters Analyzed

Enter text above and click Analyze to detect AI-generated content.

Key Indicators

Indicators will appear here after analysis.

Disclaimer: This tool provides estimates only and should not be used as definitive proof that text is AI-generated or human-written. AI detection is inherently probabilistic and can produce false positives and false negatives. Do not use results from this tool to accuse individuals of using AI or to make consequential decisions. The creators of this tool are not responsible for any misuse of results.

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ガイド

AI コンテンツ検出機

Analyze text to determine whether it was likely written by an AI language model or by a human. This tool uses AI to evaluate writing patterns, vocabulary choices, sentence structure, and other linguistic indicators to provide a confidence-rated verdict on the origin of the text.

使用方法

Paste the text you want to analyze into the input field (minimum 50 characters, maximum 5,000 characters). Click the Analyze button to submit the text for AI analysis. The tool will return a verdict (Likely AI-Generated, Possibly AI-Generated, Likely Human-Written, or Uncertain), a confidence score, key indicators that informed the decision, and a detailed analysis summary.

機能

AI-Powered Analysis – Uses advanced AI models to evaluate text for machine-generated patterns
Confidence Scoring – Provides a 0-100 confidence score alongside the verdict
Key Indicators – Lists specific linguistic patterns detected in the text with explanations
Detailed Analysis – Provides a comprehensive summary of the assessment
Try an Example – Includes a sample text to quickly see how the tool works

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 よくある質問

How do AI content detectors identify machine-generated text?

AI content detectors analyze statistical patterns in writing that differ between human and AI-generated text. They look for indicators such as uniform sentence length and structure, predictable vocabulary distribution (perplexity), consistent hedging language, lack of personal anecdotes or emotional variation, formulaic topic transitions, and an evenness of quality throughout the text that humans rarely maintain.
What is perplexity in the context of AI-generated text?

Perplexity is a measurement of how predictable a sequence of words is to a language model. AI-generated text tends to have low perplexity because the model chooses statistically likely word sequences. Human writing typically has higher perplexity because people use unexpected word choices, creative expressions, slang, and personal style that make the text less predictable to a language model.
Can AI content detection produce false positives?

Yes, AI content detectors can produce false positives, particularly with highly formal or technical writing, non-native English speakers whose writing may appear formulaic, heavily edited or polished text, and content that follows strict style guides. Studies have shown that detection tools can misclassify human-written text as AI-generated at rates varying from 2% to over 20% depending on the tool and text type.
What is the difference between watermarking and detection in AI text identification?

Watermarking embeds invisible statistical patterns into AI-generated text at the time of creation, making it identifiable later with near-perfect accuracy. Detection, by contrast, analyzes text after the fact without any embedded signals, relying on statistical properties of the writing. Watermarking is more reliable but requires cooperation from the AI provider, while detection works on any text but is inherently probabilistic and less accurate.