Coursera 16 hours worth of material , 4 weeks long 16 hours worth of material , 4 weeks long

Coursera 27 hours worth of material , 12 weeks long 27 hours worth of material , 12 weeks long

Coursera 54 hours worth of material , 6 weeks long 54 hours worth of material , 6 weeks long

Coursera 38 hours worth of material , 9 weeks long 38 hours worth of material , 9 weeks long

edX 2-3 hours a week , 12 weeks long 2-3 hours a week , 12 weeks long

Udacity 8 weeks long 8 weeks long

Coursera 19 hours worth of material , 6 weeks long 19 hours worth of material , 6 weeks long

edX 10-14 hours a week , 16 weeks long 10-14 hours a week , 16 weeks long

edX 12 weeks long 12 weeks long

Udacity 6 hours a week , 16 weeks long 6 hours a week , 16 weeks long

Udacity 16 weeks long 16 weeks long

FutureLearn 6 hours a week , 6 weeks long 6 hours a week , 6 weeks long

edX 10-15 hours a week , 8 weeks long 10-15 hours a week , 8 weeks long

edX 5 weeks long 5 weeks long

edX 5-10 hours a week , 4 weeks long 5-10 hours a week , 4 weeks long

Kadenze

Coursera 8-10 hours a week 8-10 hours a week

edX 10-15 hours a week , 13 weeks long 10-15 hours a week , 13 weeks long