Unfox AI

Unfox AI is a free online AI detector and checker built to accurately identify AI-generated content from major language models such as ChatGPT, Claude, and Gemini. Whether you are reviewing an essay, an article, or a report, it helps you quickly find out what was written by a human and what was not.

At its core is a deep learning AI detection engine that analyzes text features like perplexity and burstiness to catch non-human traces. It can even flag AI involvement in rewritten or polished text, where simpler detectors often fail to see through the surface.

Results come back as a sentence-level highlighted report that clearly distinguishes AI-suspected passages from human-written ones. This makes it easy to spot problems line by line, so teachers, editors, and content creators can act with confidence.

With Unfox AI, you can protect originality, preserve academic integrity, and avoid potential search engine penalties on your website — all with one free, easy-to-use tool.