AI Checker is an online tool that leverages advanced AI technology to scan and identify AI-generated content within a variety of written inputs such as documents, website content, and social media messages.

It is primarily designed to differentiate human-written text from AI-composed entries, highlighting potential instances of plagiarism or AI-generated content.

This tool functions by comprehensively analysing writing style, sentence structure, repetition of phrases, vocabulary usage, academic language, and grammatical errors, common traits of AI-generated text.

It's also capable of detecting AI writings from tools like ChatGPT, Bard, GPT-3 and GPT-4. AI Checker uses a series of technologies to accomplish this, including Natural Language Processing (NLP), Semantic Analysis, Statistical Analysis, and Stylometric Analysis.

Users are provided with a percentage-based score representing the likelihood of the text being AI-generated. AI Checker is incredibly versatile, suited to various professional use-cases such as writers, authors, students, content creators, marketers, business professionals, translators, journalists, and researchers.

It's easily accessible, user-friendly, offering a rich set of features. Moreover, it undergoes constant learning and evolution to adapt to new patterns of AI-generated content or plagiarism.