Yes, some Harvard courses give a free certificate, and they are all part of the CS50 family. If you complete every assignment in CS50x, CS50 Python, CS50 AI and several others, CS50 issues its own free certificate. Most other Harvard courses on edX are free to study but charge for a verified certificate. The trick is to submit your work through CS50's own platform instead of paying on edX.
Key takeaways
- CS50 offers a free CS50 Certificate and a separate paid verified certificate from edX for each course.
- About ten CS50 courses have a free certificate, including Python, AI, SQL, web and cybersecurity.
- You must register with edX even for the free certificate, but you do not have to pay.
- Other HarvardX courses are usually free to study, with a paid certificate.
Which Harvard courses give a free certificate?
Harvard's computer science department runs CS50 as an open course family. CS50's course list says that for each course it offers a verified certificate for a fee and a free certificate. Class Central's CS50 guide counted ten courses with free certificates.
| Course | Topic | Good for |
|---|---|---|
| CS50x | Introduction to computer science | Serious beginners |
| CS50P | Programming with Python | First-time programmers |
| CS50 AI | Artificial intelligence with Python | After CS50x or CS50P |
| CS50 Web | Web programming with Python and JavaScript | After CS50x |
| CS50 SQL | Databases with SQL | Data and backend skills |
| CS50 Cybersecurity | Security concepts | Non-programmers too |
| CS50 Scratch | Programming with Scratch | Younger students |
| CS50 Business and CS50 Law | Computing for professionals | Non-technical learners |
| CS50 R | Programming with R | Statistics students |
CS50's Understanding Technology, its games course and its mobile course do not offer certificates, according to the same Class Central guide.
How do you earn the free CS50 certificate?
The CS50x FAQ explains the two options. A verified certificate is bought from edX and involves identity verification. A CS50 Certificate is a free certificate from CS50 itself. You can earn both, and you must register with edX in either case, even though the free route needs no payment.
- Open the course from cs50.harvard.edu, not from an edX advert.
- Create a free edX account and a GitHub account, which CS50 uses for submitting work.
- Watch each lecture and complete every problem set and the final project.
- Score at least 70% on each assignment. Work is checked automatically and for originality.
- Your free certificate appears in your CS50 gradebook once everything is marked.
If edX asks you to pay when you enrol, choose the free option. Payment is only for the verified certificate, and CS50's FAQ covers this exact situation.
Which CS50 course should you take first?
CS50's own guidance is that you can take CS50 Python before, during or after CS50x, but for an introduction to computer science itself you should still take CS50x. From teaching beginners, I would put it this way:
- Never coded before and short on time: start with CS50P. It is shorter and uses one friendly language.
- Want a strong foundation for a degree or career: take CS50x. It is harder and covers C, Python, SQL and web basics.
- Interested in AI: do CS50P or CS50x first, then CS50 AI, which needs Python.
- Not planning to code: CS50 Cybersecurity or CS50 Business teaches the ideas without heavy programming.
We compare CS50P with other beginner options in free Python courses with certificates, and CS50 AI appears in free AI courses with certificates.
Are other Harvard courses free?
Harvard publishes many other courses through HarvardX on edX, in subjects from data science to public health and philosophy. SchoolMaker's guide to Harvard online courses describes the model: these are free to audit, with an optional paid certificate that typically costs between US$149 and US$199.
That means you can learn from them for free, but you cannot list a certificate unless you pay or receive edX financial assistance. If the certificate matters, stay with the CS50 family.
Is a free CS50 certificate worth putting on a CV?
Yes, with honest wording. List it as a course certificate from CS50, Harvard University's introduction to computer science, not as a Harvard degree or qualification. The verified certificate carries identity checks, so it may be seen as more authentic, and CS50 says so itself.
What impresses people most is the final project. CS50x ends with a project of your own design, so link to it. For university applications, a completed CS50 course is good evidence of interest in computing, and it pairs well with subject choices such as AP Computer Science A or Principles.
Frequently asked questions
Is the Harvard CS50 certificate free?
Yes. CS50 issues its own free certificate when you complete all the assignments with a passing score. The edX verified certificate is a separate, paid option.
Do I need to pay edX to take CS50?
No. You need a free edX account to register, but payment is only required if you want the verified certificate.
How long does CS50x take?
Class Central lists it as about 12 weeks at around 12 hours a week, but it is self-paced, so many learners take longer.
Sources
- CS50x frequently asked questions, Harvard CS50
- CS50 courses, Harvard CS50
- Harvard CS50 guide: how to pick the right course, Class Central
- Best Harvard online courses in 2026, SchoolMaker