The Sandbox is the web developer's playground. It is a single directory filemanger that is designed to be extremely lightweight, allowing a developer to quickly write PHP files without having to go through the trouble of using complex filemanagers with oversimplified editors like CPanel's filemanager. Many of the filemanagers that exist today are complex and bloated for the purpose of quickly editing a test file. However, this is because they aim to be powerful by supporting multiple directories and allowing users to perform complex tasks. The Sandbox is an alternative to such filemanagers. Using a single-directory system, the sandbox can allow you to quickly write a PHP script, upload a file, and perform multiple other tasks within a directory you specify. It uses JavaScript whenever it can, so the interface is extremely fast and light-weight. Error checking is built in. A multiple directory version is planned.