An HTTP Client is a software application or tool that enables users to send requests to a web server and receive responses. It operates using the Hypertext Transfer Protocol (HTTP), which is the foundation of data communication on the World Wide Web. HTTP clients can be found in various forms, including web browsers, mobile apps, and command-line tools. These clients facilitate interactions with web services by allowing users to retrieve web pages, submit forms, and access APIs. Popular examples of HTTP clients include Google Chrome, Mozilla Firefox, and command-line tools like cURL. They help users navigate the internet and interact with online resources efficiently.