FoldSum is a Chrome extension tool developed by foldsum that utilizes the ChatGPT model for text summarization and translation. Its primary aim is to enhance reading efficiency by allowing users to summarize selected text on web pages seamlessly. Users can specify text for summarization and translation, replacing it directly within the webpage. FoldSum supports multiple languages and provides summarization and translation in a single step without incurring additional token costs. To use FoldSum, users need to download and install the browser extension, enabling them to summarize text with a simple click. The tool is free to use, does not collect user information, and offers various features such as support for different browsers, language customization, and nested summaries.