Replit is an online platform that provides a development environment for a variety of programming languages. It allows users to write, run, and share code online without the need to install any software on their local machines. Replit includes a range of features, such as syntax highlighting, code completion, and debugging tools, to help users write and test their code. It also provides a collaborative coding environment, allowing users to work on code together in real-time. Replit is used by individuals, educators, and businesses to learn, teach, and develop software. It is available for a wide range of programming languages, including Python, Java, C++, and more, and can be accessed from any device with an internet connection.