A FormData object is a built-in feature in web browsers, part of the Web API, that facilitates the submission of various data types, such as strings, numbers, objects, files, and unstructured data. It can be used independently of a form. This standard functionality is compatible with major modern browsers like Chrome, Firefox, Edge, and Safari. By allowing the submission of complex data such as objects or files, FormData operates asynchronously, ensuring a smooth user experience by preventing any interruption in code execution until the request is complete. Its purpose is to replace the synchronous XMLHttpRequest used in AJAX, which requires a page reload to interact with the server.