AI Content Detector
With AI writing tools becoming more common, knowing whether a piece of text was written by a human or generated by AI matters more than ever. Teachers want to catch AI-generated essays. Editors want to verify original content. Readers want to know if they're engaging with human thought. Our AI Content Detector analyzes your text using multiple linguistic patterns — perplexity, burstiness, word predictability, and sentence structure variation — to estimate the likelihood that AI was involved in creating it. Paste any text and get an instant probability score. It's not perfect, but it gives you a solid starting point for evaluating content authenticity.
What Is
An AI Content Detector is a tool that analyzes text to estimate the probability that it was generated by artificial intelligence rather than written by a human. AI-generated text tends to be more predictable, use more common word choices, have less variation in sentence length, and follow more rigid structural patterns. The detector evaluates multiple signals: perplexity (how surprising the word choices are), burstiness (variation in sentence structure and length), vocabulary diversity, and structural patterns typical of language models. The result is typically expressed as a percentage likelihood of AI involvement. It's important to understand that no detector is 100% accurate — they can produce both false positives (flagging human writing as AI) and false negatives (missing AI-generated content). Use the detector as a screening tool, not definitive proof.
How to Use
- Copy the text you want to analyze — it can be an essay, article, email, or any written content
- Paste the text into the AI Content Detector's input area, which accepts up to several thousand words
- Click the 'Analyze' button and wait a moment for the processing to complete
- Review the overall AI probability score displayed prominently on the results panel
- Look at the sentence-level analysis which highlights individual sentences by likelihood of AI generation
- Use the detailed breakdown to understand which linguistic patterns influenced the score
Examples
Input: Text: 'The quick brown fox jumps over the lazy dog repeatedly and showcases its agility with remarkable consistency throughout the entire duration of the demonstration.'
Process: Analyze perplexity + burstiness + pattern regularity → Compare human vs AI distributions
Result: AI Probability: 87% (low perplexity, uniform sentence length)
Input: Text: 'So I called my friend like, dude, that movie was crazy! Honestly though, the ending made zero sense...'
Process: Detect irregularities + contractions + slang + emotional variance
Result: Human Probability: 92% (high burstiness, colloquial patterns)
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Frequently Asked Questions
How accurate is the AI Content Detector?
No AI detector is perfectly accurate, and ours is no exception. Independent studies show AI detectors typically achieve 70-90% accuracy depending on the type of text and the AI model that generated it. Short texts are harder to classify than long ones, and human-edited AI content is harder to detect than raw AI output. Newer AI models produce increasingly human-like text, making detection an ongoing challenge. We recommend using the detector as a screening tool that flags content for further review, not as definitive proof of AI involvement.
Can AI detectors be fooled?
Yes, there are several ways AI-generated text can be modified to evade detection. Paraphrasing tools, mixing AI and human writing, manually editing AI output, and using 'adversarial' prompting techniques can all reduce detection accuracy. Conversely, some types of human writing — especially formal, structured, or formulaic text — can trigger false positives. This is why experienced users look at the sentence-level analysis rather than relying solely on the overall score.
What's a 'safe' score to show my writing is human?
There's no universally agreed-upon threshold, but generally a score below 20-30% AI probability suggests the text is likely human-written. Scores between 30-70% are in a gray area and should be interpreted cautiously. Above 70% suggests significant AI involvement. However, these thresholds vary by context — academic institutions may use stricter cutoffs than casual users. If you're concerned about a false positive, try revising sections flagged as high-AI and re-running the analysis.
Does the detector work with non-English text?
Most AI detectors, including ours, are optimized for English text. Detection accuracy drops significantly for other languages because the underlying models were primarily trained on English corpora. If you paste text in Spanish, French, Chinese, or other languages, the results may be less reliable. For non-English content, we recommend using detectors specifically trained on those languages for more accurate results.
Is my text stored after analysis?
No, we do not store the text you submit for analysis. The processing happens in real-time and the text is not saved to any database. This ensures your content remains private, which is especially important if you're analyzing confidential documents, unpublished work, or sensitive communications. You can use the detector with confidence that your text isn't being collected or reviewed by anyone.