Best Free Online Courses (2026)
- 30 picks
- 30 free
- 6 providers
This is the short list: the courses we would recommend to a friend who has the time and wants the real thing rather than a taster. Each one is complete, is taught well enough to follow alone, and either grades your work or gives you enough exercises to grade yourself. The reason for each pick sits under its title.
The order is editorial. It weighs depth first, then teaching, then how much the course still holds up. Cost and certificate terms are shown as the provider states them and were checked on the date above.
| # | Course | Provider | Cost | Certificate | Level | Duration | Open |
|---|---|---|---|---|---|---|---|
| 1 | CS50's Introduction to Computer Science Full university CS course with a free, shareable certificate and no paywall on any material. | Harvard | Free | IncludedCertificate included | Beginner | 11 weeks | |
| 2 | CS50's Introduction to Programming with Python A complete Python course with graded problem sets and a free certificate, no software install required. | Harvard | Free | IncludedCertificate included | Beginner | 10 weeks | |
| 3 | CS50's Introduction to Artificial Intelligence with Python Project-based AI course covering search, optimization, machine learning and LLMs with a free certificate. | Harvard | Free | IncludedCertificate included | Intermediate | 7 weeks | |
| 4 | CS50's Web Programming with Python and JavaScript Project-based Django and React course that ends with a deployable application, with a free certificate. | Harvard | Free | IncludedCertificate included | Intermediate | 9 weeks | |
| 5 | CS50's Introduction to Databases with SQL Hands-on SQL from SQLite to PostgreSQL and MySQL, graded problem sets and a free certificate. | Harvard | Free | IncludedCertificate included | Beginner | 7 weeks | |
| 6 | CS50's Introduction to Cybersecurity Short non-technical security course from Harvard with a free certificate. | Harvard | Free | IncludedCertificate included | Beginner | 5 weeks | |
| 7 | CS50's Introduction to Programming with R R and the tidyverse taught with graded problem sets and a free certificate. | Harvard | Free | IncludedCertificate included | — | 7 weeks | |
| 8 | CS50's Introduction to Programming with Scratch Gentlest entry to programming in the CS50 family, with a free certificate. | Harvard | Free | IncludedCertificate included | Beginner | 9 weeks | |
| 9 | CS50's Computer Science for Lawyers Technology fundamentals framed around legal implications, with a free certificate. | Harvard | Free | IncludedCertificate included | Beginner | 10 weeks | |
| 10 | The Science of Well-Being Yale's most-taken psychology course is fully free on Coursera, certificate optional. | Yale | Free | PaidPaid certificate | — | — | |
| 11 | Moral Foundations of Politics A complete Yale political theory course, free in full on Coursera with an optional certificate. | Yale | Free | PaidPaid certificate | — | — | |
| 12 | Linear Algebra The complete Strang lecture series with notes, recitation videos, problem sets and exams, all free. | MIT | Free | NoneNo certificate | — | — | |
| 13 | General Philosophy A complete first-year Oxford philosophy lecture course, free, openly licensed and transcribed. | Oxford | Free | NoneNo certificate | — | — | |
| 14 | Algorithms, Part I Sedgewick and Wayne's classic algorithms course, fully free with graded programming assignments. | Princeton | Free | NoneNo certificate | Intermediate | 5 weeks | |
| 15 | CS106A - Programming Methodology Stanford's first programming course, complete with 28 lectures, assignments and exams, free. | Stanford | Free | NoneNo certificate | — | — | |
| 16 | Financial Markets (2011) A full Yale semester on finance with lectures, transcripts, problem sets and exams, all free. | Yale | Free | NoneNo certificate | — | — | |
| 17 | Introduction to Computer Science and Programming in Python A full introductory Python course from MIT with lecture videos, slides, code and problem sets. | MIT | Free | NoneNo certificate | — | — | |
| 18 | Approaching Shakespeare Thirty-two single-play lectures by an Oxford Shakespeare scholar, free and openly licensed. | Oxford | Free | NoneNo certificate | — | — | |
| 19 | Algorithms, Part II Graph and string algorithms from Princeton, fully free with programming assignments. | Princeton | Free | NoneNo certificate | Intermediate | 6 weeks | |
| 20 | CS106B - Programming Abstractions A full second-semester data structures course in C++ with assignments and exams, free. | Stanford | Free | NoneNo certificate | — | — | |
| 21 | Introduction to Psychology Twenty full Yale lectures covering the whole introductory psychology syllabus at no cost. | Yale | Free | NoneNo certificate | — | — | |
| 22 | Critical Reasoning for Beginners Six clear lectures on spotting and testing arguments, free, with video and transcripts. | Oxford | Free | NoneNo certificate | Beginner | — | |
| 23 | Computer Science: Programming with a Purpose Princeton's first programming course in Java, free in full with assignments. | Princeton | Free | NoneNo certificate | Beginner | — | |
| 24 | CS107 - Programming Paradigms Stanford's systems and paradigms course with 27 lectures, assignments and exams, free. | Stanford | Free | NoneNo certificate | — | — | |
| 25 | Death A complete philosophy lecture course on a question everyone faces, free with transcripts. | Yale | Free | NoneNo certificate | — | — | |
| 26 | Introduction to Algorithms Twenty recorded lectures plus notes, problem sets and exams from MIT's core algorithms class. | MIT | Free | NoneNo certificate | — | — | |
| 27 | Computer Science: Algorithms, Theory, and Machines The second half of Princeton's introductory computer science sequence, free in full. | Princeton | Free | NoneNo certificate | Intermediate | 2 weeks | |
| 28 | CS223A - Introduction to Robotics Stanford's graduate robotics foundations course, 16 free lectures with notes and problem sets. | Stanford | Free | NoneNo certificate | — | — | |
| 29 | The American Revolution Twenty-five Yale lectures on the Revolution and the founding, free with transcripts and readings. | Yale | Free | NoneNo certificate | — | — | |
| 30 | Single Variable Calculus A complete single variable calculus course built for self-study, with videos, notes and exams. | MIT | Free | NoneNo certificate | — | — |
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Picks by subject
Questions about the picks
How are the picks chosen?
By the same three tests as every ranking on the site: how far the course takes you, how well the teaching works when you study alone, and whether the work is graded. Each pick has a one-line reason next to it. Nobody can pay to appear here.
Why are some picks only free to audit?
Because the teaching is worth it even without the certificate. Where a pick is free to audit, the certificate and graded work are paid and the row says so; the course material itself costs nothing.
How often does the list change?
Picks are re-checked on the same cadence as every other entry, at least every 180 days, and replaced when a course disappears or a clearly better one appears.
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