Mocker is a tool that allows you to generate fake, or 'mock', data that can be used for testing or prototyping purposes. It uses a library called Faker.js, which generates fake data such as names, addresses, and phone numbers in a variety of formats. By creating an API endpoint, the tool enables users to create a mocked data set and use it for testing of applications or as a substitute for data that is not yet available in a development stage, also enable a client to test their apps and other functions, in a more realistic scenario.