ScanGPT is an advanced browser extension that allows users to easily identify text that has been generated by AI, specifically the GPT (Generative Pre-trained Transformer) model, on any web page. This extension provides several features to help users detect AI-generated content, including scanning for paragraphs that are likely to be GPT-generated, displaying the total number of paragraphs on the page, and highlighting the maximum probability observed in these paragraphs. Additionally, ScanGPT calculates the probability of the entire page being generated by AI. This powerful tool can be used to deceive, improve critical thinking, or detect instances of AI-generated content online, making it useful for researchers, journalists, fact-checkers, and anyone concerned about the reliability and authenticity of online information.