Unfox AI

What is Unfox AI

Unfox AI is a free online AI content detector that accurately identifies AI-generated text and writing from models like ChatGPT, Claude, Gemini, DeepSeek, and more. It uses a deep learning engine to analyze text perplexity, burstiness, and other features, providing a confidence score and sentence-level highlighting to show which parts are AI-suspected or human-written. The tool supports multiple languages, including English and Chinese, and prioritizes user privacy by not storing any submitted content.

How to use Unfox AI

1. Go to the Unfox AI homepage.
2. Paste or type the text you want to check into the text area, or upload a .txt or .md file.
3. Optionally, click one of the sample buttons (ChatGPT, Claude, DeepSeek, Human) to try a pre-loaded example.
4. Click the "Detect" button to run the analysis.
5. View the detection result, which includes an AI/Human percentage score and a sentence-level highlighted report.

Features of Unfox AI

• Deep Learning AI Detection Engine: Analyzes text perplexity, burstiness, and other features to catch even rewritten or polished AI-generated content.
• Multilingual & Multi-Model Coverage: Supports English, Chinese, and other languages; detects content from ChatGPT, Claude, Gemini, DeepSeek, Grok, Qwen, Kimi, Doubao, and more.
• Sentence-Level Highlighted Report: Highlights each sentence as "AI-suspected" or "human-written" for instant insight.
• Bulk Detection & API Integration: Supports bulk document uploads and offers an API for embedding AI detection into workflows.
• Free to Use: No registration required for basic detection.
• Privacy-First: Submitted content is immediately discarded after detection and never stored.

Use Cases of Unfox AI

• Education: Teachers and students can verify the originality of essays and assignments to uphold academic integrity.
• Content Creation: Editors and creators can ensure articles pass originality checks before publishing.
• Recruitment & Due Diligence: HR professionals can check if cover letters or reports are AI-generated.
• Website Operations: Site owners can scan content to avoid search engine penalties for purely AI-generated material.

FAQ

Is the AI detector really accurate? Yes. In a test set of millions, the false positive rate is below 0.2%, achieving 99.8% accuracy.

What is the difference between the free AI detector and the paid version? The free version provides core detection capabilities. The paid version offers additional features like higher usage limits and API access.

Will you store my content? No. Submitted content is immediately discarded after detection and never stored. Your privacy is fully protected.