AI Content Detector
Free AI Content Detector to quickly determine whether a given text was written by a human or generated by an AI. Perfect for verifying content authenticity.
Result
Please check your inputs.
How to Use This Tool
Paste or type the text you want to analyze into the input box provided on the tool page.
Click the 'Detect' button to start the AI content analysis process.
Wait a few seconds for the algorithm to process the text and compute results.
Review the displayed probability score (0โ100%) indicating how likely the text is AI-generated.
Examine the optional detailed breakdown showing which linguistic features contributed to the score.
What Is AI Content Detector?
The AI Content Detector is a free online tool that uses advanced machine learning to differentiate human-written text from AI-generated content. As AI writing tools become common in education, publishing, and business, verifying authenticity is essential to maintain trust and originality. This tool analyzes textual features like perplexity, burstiness, and sentence structure to produce a reliable probability score. By quickly flagging potential AI content, it helps educators check student work, publishers vet submissions, and content managers ensure brand consistency.
Formula
The tool employs a logistic regression model: P(AI) = 1 / (1 + e^-(ฮฒ0 + ฮฒ1ยทx1 + ฮฒ2ยทx2 + ... + ฮฒnยทxn)). Here, P(AI) is the probability the text is AI-generated, e is Euler's number, ฮฒ0 is the intercept, and ฮฒ1...ฮฒn are coefficients assigned to features such as word predictability, sentence length variance, and n-gram patterns. The variables x1...xn represent the numeric values of those features extracted from the input text. In simple terms, the model weighs dozens of statistical cues to output a score between 0 and 1, where values closer to 1 strongly suggest AI authorship.
Tips for Best Results
๐ Test suspicious text in small chunks (100โ200 words) for more granular and reliable results.
๐ Combine our AI Content Detector with a plagiarism checker for a full authenticity audit.
โ ๏ธ Remember that very short texts (under 50 words) may yield less accurate scores; longer samples improve confidence.
๐ Use the probability percentage as a guide, not a verdict โ always manually review flagged content before making decisions.
Frequently Asked Questions
How accurate is the AI Content Detector?
Our detector achieves over 95% accuracy on standard-length texts from common AI models. However, heavily edited or extremely short passages may produce less reliable results. We recommend treating the score as a strong indicator rather than absolute proof.
Can the tool detect content from any AI model, like GPT-4 or Claude?
Yes, the model is trained on outputs from major AI generators including GPT-3, GPT-4, Claude, and Gemini. It focuses on statistical patterns common to machine-generated text, so it remains effective even as models evolve.
Is there a limit on how much text I can check?
The free version supports up to 1,000 characters per analysis. For longer documents, you can paste multiple sections separately or upgrade to our premium plan, which handles up to 10,000 characters per request.