Building an automatic cloud-based solution using Vanilla JavaScript, specifically with XMLHttpRequest and the Fetch API, to manage spreadsheet metadata offers a streamlined and accessible approach to document enrichment in modern workflows. This solution is ideal for lightweight web applications, client-side integrations, and environments where metadata accuracy and visibility are essential. By leveraging native JavaScript capabilities, developers can create a responsive, browser-compatible system that reads and updates metadata in real time-without relying on external libraries or server-heavy logic. Supported formats include .xlsx, .xls, .csv, .tsv, .numbers, and more.

In essence, this Vanilla JavaScript solution provides a nimble, cloud-compatible method for automating spreadsheet metadata editing. It empowers developers to build fast, secure, and scalable workflows using only native browser technologies. Whether embedded in a web portal, integrated into a SaaS platform, or used as a standalone tool, this system ensures that spreadsheet files are enriched with meaningful metadata-ready for search, compliance, and collaboration.