100% Free AI Detector
No account. No API key. No subscription. No word limits. No paywalls. The detector runs as JavaScript in your browser — zero server cost, zero charge to you.
AI Text Detector
Paste any text — instant results, no login required
Signal Breakdown tap to expand
Why Most AI Detectors Charge Money
Most AI detectors send your text to the OpenAI API or another language model to score it. That API call costs approximately $0.002 per check. Multiply by millions of users and you have a real operating cost — which they pass to you as a $20/month subscription.
We do something different. Our detector runs 12 linguistic algorithms entirely in your browser as JavaScript. There's no API call. No server. No cost. Which means no charge to you — ever.
What "Free Forever" Actually Means
10 things this free detector includes:
Honest Comparison with Paid Tools
| Tool | Price | Login | Word Limit | Private |
|---|---|---|---|---|
| AI Detector Free (this) | $0 forever | None | No limit | 100% — browser only |
| GPTZero | $20/mo | Required | 5,000 words | Text sent to servers |
| Originality.ai | $30/mo | Required | Per credit | Text sent to servers |
| Winston AI | $18/mo | Required | Per plan | Text sent to servers |
| Turnitin AI | Institutional | Institution | Per submission | Text stored |
What paid tools offer that we don't: confidence intervals with LLM backing, plagiarism detection, report PDFs, team accounts. What we offer that they don't: completely free, fully private, no account, no word limit.