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CS50x
Harvard’s self-paced introduction to computer science, with a free CS50 Certificate for learners who complete the required work.
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Last checked Aug 9, 2026
What is free?
CS50x course access and the CS50 Certificate are free. Learners qualify for the free certificate by receiving at least 70% on every required problem set, lab and final project.
What are the limitations?
The free CS50 Certificate is different from the paid verified certificate offered through edX. It does not itself provide Harvard academic credit. Completing the course requires multiple programming assignments and a final project, not just watching lectures.
Who is it best for?
Beginners prepared for a demanding, structured introduction to computer science who want a legitimate free completion certificate tied to assessed work.
Muft verdict
A high-value free course and certificate when you want rigorous foundations. Pick it for the learning and assessed projects; pay edX only if its separate identity-verified credential matters to you.