⚠️ Disclaimer: This is an AI probability estimate, not legal or academic proof. Best accuracy with 100+ words. Always verify manually.
Paste your text below (minimum 50 words, 100+ recommended) 👇
⚡ Instant
Get results in under 5 seconds.
🎯 Accurate
Powered by Earlybird AI model.
🔒 Private
We never store your text.
What is FS AI Detector?
FS AI Detector is a free online tool that analyzes text and estimates whether it was written by a human or generated by an AI model such as ChatGPT, Claude, or Gemini.
Why Use FS AI Detector?
- Free & Unlimited — No signup, no payment, no limits.
- Modern AI Detection — Detects GPT-4, Claude, Gemini, Llama.
- Privacy First — Your text is never stored.
- Fast Results — Under 5 seconds per check.
How It Works
When you paste text, it's sent securely to our Cloudflare backend, which calls the Earlybird model on Hugging Face. The model analyzes patterns like sentence structure, word choice, and repetition, then returns a probability score.
Frequently Asked Questions
Is FS AI Detector really free?
Yes, 100% free with unlimited checks.
How accurate is it?
Up to 96% accuracy with 100+ words.
Do you store my text?
No. Text is processed in real-time and discarded.