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AI Content Detector

AI Content Detector
Human or Machine?

Detect AI-generated content on any webpage. Google's Helpful Content system penalizes low-quality AI content — check if yours passes.

Instant Analysis
100% Free
Heuristic Detection

Frequently Asked Questions

How does AI content detection work?
We analyze writing patterns like sentence length variance, contraction usage, personal pronouns, and vocabulary complexity. AI-generated content often has uniform sentence lengths, fewer contractions, and more formal language.
Why does AI content detection matter for SEO?
Google's Helpful Content system penalizes AI-generated content that doesn't add value. AI search engines like Google AI Overviews prefer content that demonstrates genuine expertise and first-hand experience.
Is AI-generated content bad for SEO?
Not necessarily — Google says AI-generated content is fine if it's helpful and provides value. But content that's clearly AI-generated without human editing or expertise may get deprioritized in both traditional and AI search.
How accurate is this detector?
This tool uses heuristic analysis and can detect common AI writing patterns. However, no AI detection tool is 100% accurate, especially with edited or mixed content. Use results as a guide, not a definitive answer.

About this tool

AI content detection is, frankly, a coin flip dressed up in confidence intervals. Every detector gets fooled by lightly edited GPT output, and every detector occasionally flags genuinely human writing as AI — usually anything written in clean technical English by someone who is good at their job.

So why ship one? Because used as a screen rather than a verdict, it's still useful. If you're a manager reviewing freelancer submissions, a detector flagging 8 of 10 paragraphs as "high confidence AI" is a reasonable prompt to ask for the writing process. If you're auditing your own site for the helpful-content update, finding pages that scan as 100% AI-generated is worth a look — Google's not running this exact detector, but the same patterns it picks up (low perplexity, formulaic sentence rhythm, generic vocabulary) are what trigger their helpful-content downgrades.

We run seven independent signals in parallel — perplexity scoring, burstiness analysis, vocabulary distribution, transition phrase frequency, sentence length variance, and two more — and report a confidence range, not a verdict. Treat the result as a smoke alarm, not a polygraph.

Frequently asked questions

How accurate is AI content detection?+
No detector is 100% accurate. The tool uses seven independent signals (perplexity patterns, sentence rhythm, vocabulary distribution, and more) and reports a confidence range. Treat results as guidance, not proof.
Which AI models can it detect?+
The tool is tuned for content generated by ChatGPT (GPT-3.5/4/4o/5), Claude, Gemini, and Llama family models. Heavy human editing reduces detection accuracy.
Can detection be bypassed?+
Yes — paraphrasing, mixing in human text, and tools that intentionally "humanize" AI output all degrade detection. Use this as a content-quality signal, not a verdict.
Does AI content hurt SEO?+
Google's position is that AI content is fine if it's helpful, accurate, and original. AI content that's thin, generic, or unverified is what gets penalized under the helpful content update.
Is the input stored?+
No. The text you submit is processed in memory and discarded after the analysis. Nothing is saved to a database.

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