Estimate how likely your text is AI-generated—using mode-tuned analysis and clear, actionable signals.
Ready when you are
Run a scan to see AI likelihood, confidence, a short rationale, and concrete pattern indicators.
As AI writing tools like ChatGPT, Claude, and Gemini become more prevalent, the need to verify human authorship has never been greater. Our free AI content detector uses advanced natural language processing to identify the subtle fingerprints left behind by language models.
It works by analyzing two key metrics: perplexity and burstiness. Perplexity measures how predictable a sequence of words is (AI models tend to use highly predictable vocabulary). Burstiness measures the variation in sentence length and structure (humans naturally mix short, punchy sentences with long, complex ones).
If a document has low perplexity and low burstiness, there is a high probability it was machine-generated.
Get a percentage likelihood of whether your text was generated by an AI model or written by a human.
Our detector highlights specific sentences and patterns (like low perplexity) that trigger AI flags.
Switch between Standard, Strict, and Creative modes to fine-tune how aggressively the detector flags AI content.
Run unlimited scans without hitting a paywall. Keep your content authentic and original without limits.
Copy and paste your blog post, essay, or email into the analyzer.
Choose Standard for everyday checks, Strict for academic papers, or Creative for expressive writing.
Review the probability score, confidence level, and key indicators to determine originality.
Pricing plans for teams of all sizes
Choose an affordable plan that fits how you use our AI humanizer, grammar checker, plagiarism scan, and AI detector.
Perfect for testing our AI humanizer capability.
$0/month
Get started todayFor teams and power users who need higher limits and priority support.
$5/month
Get started today