edX is one of the biggest and most known sources of online education. edX is an American open online course provider designed by Harvard and MIT. It has online college level courses in a wide scope of disciplines for students all around the world. edx also has a lot of courses that are completely free. It additionally leads the investigation into learning dependent on how individuals utilize its foundation. Moreover, the Verified Certificates are optional. Once you complete a course, you can choose to take it.