There are plenty of online courses available lint the market but most of them failed to create impact on learners as they unable to meet the learner requirements. I better suggest you to go for highly reputed institutions because these certifications has huge value in the market. For that I will suggest you Intellipaat which is offering the best UI UX design course which is already proven by ranking as #1 course by CXO Outlook.
This program offers numerous beneficial features to its learners like training from IIT faculty, LMS portal, specialization certification, 24*7 available support team, placement assistance, 3 job guarantee interviews, an exclusive job portal, lifetime free access to course content, free upgrades and many more in which most of them wont be available in other institutions. This training is to help you to become a certified professional with all the required skills.