Copyparty is a Python-based file server that allows users to turn almost any device into a file server with resumable uploads and downloads using any web browser. It supports various protocols, including HTTP, WebDAV, SFTP, FTP, and TFTP, and has a range of features such as file indexing, thumbnail generation, and media playback. The server can be run on a variety of platforms, including Windows, Linux, and macOS, and has a simple installation process. The project is open-source and has a detailed documentation and community support.