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ReviewsIs CS50 (Harvard) actually free?
How these scores work
Yes — Harvard's famous intro to computer science is completely free to take: every lecture, every problem set, the full experience.
A Harvard course, free in full; the only priced item is the certificate.
What you get free
- Every lecture, in full production quality
- All problem sets and the online coding environment
- The free audit track with auto-graded work
- A worldwide student community
In practice: the full Harvard course experience — lectures, problem sets, auto-grading — including a free completion certificate.
Drawbacks
- A genuinely demanding workload
- Only the verified certificate costs money
Also paywalled
- The verified certificate at the end
What the free tier actually gives you
| Card required | No |
| Full course content | Yes |
| Graded work | Yes |
| Certificate | Paid only |
| Access expires | Never |
| Ads | No |
Same questions, same order, for every listing in Learning — so you can compare them side by side. Deliberately no exact allowances: those change monthly, the shape of the limit doesn't.
Free facts
| Verdict | Truly Free |
| Card required | No |
| Auto-bills | — |
| Account | Optional for graded track |
| Limits | The paid item is the verified certificate |
| The real cost | Nothing to take the full course. |
The catch
The only thing behind a paywall is the verified certificate at the end. The education itself — the part that matters — costs nothing.
The smart play
- Take it free at cs50.harvard.edu, or audit on edX — same course, $0
- A free (unverified) CS50 certificate exists on completion — enough for most purposes
- Skip the paid verified certificate unless an employer specifically asks
More info — tap to expand
Two certificates, one free
The workload warning
Last checked: August 2026 · Verdict: Truly Free — no card, no account wall, no meaningful catch. use it and go.
Visit CS50 (Harvard) →