Nextcloud Server is an open-source, self-hosted platform for file storage, synchronization, and collaboration that allows users to maintain control of their data without relying on commercial cloud providers. Developers can use it to build private cloud solutions, integrate file-sharing capabilities into applications, or contribute to an active open-source project built primarily with PHP and JavaScript. The platform emphasizes federation and decentralization, enabling organizations to set up their own servers while maintaining interoperability with other instances.

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