CostFree (Harvard CS50 certificate) · verified edX certificate optional (paid)
DifficultyBeginner
Prep time~100 hours
Format9 problem sets + final project; 70% overall needed for certificate
Why this certificate
Harvard's CS50 is the world's most famous computer science course — and the CS50 certificate itself is free.
How to prepare
- Register free at cs50.harvard.edu/x — deadlines are rolling every term.
- Submit all 9 problem sets honestly (the academic-honesty policy is strict — cite any help).
- Score 70%+ overall (problem sets + final project) to qualify for the free CS50 certificate.
Format
Problem sets in C then Python; final project of your own design. Graded automatically + human-checked.
Pakistani tips
- The free certificate is a signed PDF from Harvard — extremely strong on a Pakistani tech CV.
- If you want an edX verified certificate too, that's optional and paid — check the current price on edX.
- Follow with CS50P (Python) and CS50SQL.