Harvard Offers These Free Courses to Anyone, No Acceptance Letter Required

Going to Harvard is still wildly expensive. For the 2026-27 academic year, Harvard College estimates the total cost of attendance at $95,134 to $100,134 before financial aid and before the university's health insurance charge for students who do not already have qualifying coverage. Fortunately, you do not need a Harvard acceptance letter or a six-figure college budget to learn from some of the university's faculty.

Harvard offers a surprisingly deep catalog of online courses through Harvard Online, HarvardX, and edX. Many can be audited for free, although the free track does not come with a verified certificate and may provide more limited access than the paid version. Most are self-paced, which makes them considerably easier to fit around a job, family, or the general chaos of being an adult.

The courses below cover everything from computer science and artificial intelligence to literature, cooking, law, astronomy, entrepreneurship, and mental health. Most are currently available on demand as of September 2026. Availability can change, however, and one older Big Data course on this list has since been retired, so check the current course page before enrolling.

24/7 Tempo reviewed current Harvard University, Harvard Online, HarvardX, and edX course listings for course descriptions, schedules, difficulty levels, and availability. These online courses are not the equivalent of enrolling at Harvard College, and auditing one does not earn a Harvard degree or regular Harvard College credit.

This post was updated in September 2026 to reflect current course information and availability.

Harvard Medical School faculty member Luana Marques leads this introduction to applied psychology and personal resilience. The course focuses on five science-driven skills for dealing with emotional stress, anxiety, burnout, and difficult situations. It also introduces ideas from cognitive behavioral therapy, including the relationship between thoughts, emotions, and behaviors, and guides students through creating their own plan for handling stressful situations.

Length: 6 weeks
Time commitment: 1 to 2 hours per week
Level: Introductory

You do not have to be headed to law school to get something out of this one. The Harvard Law School course examines how contracts are formed, what makes them enforceable, what can excuse someone from performing an agreement, and what remedies may be available when a contract is breached. It also gets into subjects including fraud, mistake, third-party rights, agency, partnerships, corporations, and government regulation.

Length: 8 weeks
Time commitment: 3 to 6 hours per week
Level: Intermediate

Law and technology meet in this version of Harvard's famous CS50 computer science course designed specifically for lawyers and law students. Instead of turning everyone into a software engineer, the course emphasizes the high-level concepts lawyers increasingly encounter in technology-driven cases and businesses. Topics include algorithms, databases, cloud computing, privacy, cryptography, cybersecurity, Python, SQL, and the legal consequences of decisions made by developers and technology companies.

Length: 10 weeks
Time commitment: 3 to 6 hours per week
Level: Introductory

This HarvardX course used large datasets to examine economic mobility, education, race, family background, geography, and other factors tied to social and economic opportunity. Students worked with statistical analysis and regression models to explore how data can identify disparities and help evaluate possible solutions.

This particular course is no longer a current open-enrollment HarvardX offering. It was part of Harvard's Big Data for Social Good material and was retired after its earlier edX run. Harvard faculty have continued teaching related material through newer courses and programs, but anyone finding this specific title on an older list should check the current Harvard Online catalog instead.

Former length: 4 weeks
Former time commitment: 1 to 2 hours per week
Level: Introductory
Availability: Archived

Starting a business is difficult enough when the infrastructure around it works. This Harvard Business School course looks at entrepreneurship in emerging economies, where entrepreneurs may also face gaps in health care, distribution, financing, regulation, and other institutions. Professor Tarun Khanna uses real-world problems to explore which challenges are well suited to entrepreneurial solutions and how to evaluate the opportunities they create.

Length: 6 weeks
Time commitment: 3 to 5 hours per week
Level: Introductory

If probability and statistics have always looked like somebody else's problem, this HarvardX course was designed with beginners in mind. It starts with basic counting and gradually moves through probability, expected value, conditional probability, Bernoulli trials, the normal distribution, and common statistical mistakes. Examples include dice, cards, the Monty Hall problem, and gambler's ruin, so the math at least has something recognizable attached to it.

Harvard continues to reference the course in its online-learning materials, although enrollment availability on edX can change between course runs.

Length: 7 weeks
Time commitment: 3 to 5 hours per week
Level: Introductory

Beer, yogurt, sourdough, chocolate, coffee, pickles, and plenty of other foods owe at least part of their character to microorganisms. This course explores the chemistry, microbiology, history, and culture of fermentation. Hands-on exercises let students experiment with microbial environments at home while making foods such as sourdough, tempeh, and mead and learning the difference between useful microbes and the ones you definitely do not want growing in dinner.

Length: 14 weeks
Time commitment: 2 to 3 hours per week
Level: Introductory

This is where the list gets considerably more ambitious. Harvard's AI course digs into the concepts and algorithms behind modern artificial intelligence, including graph search, optimization, classification, machine learning, reinforcement learning, natural language processing, and neural networks. Students put those ideas to work in Python projects rather than simply reading about what AI can supposedly do.

Length: 7 weeks
Time commitment: 10 to 30 hours per week
Level: Intermediate

This is CS50x, Harvard's well-known introduction to computer science for majors and non-majors alike. No previous programming experience is required. Students learn to think algorithmically and solve problems using concepts including abstraction, algorithms, data structures, resource management, security, software engineering, and web development. Languages and technologies include C, Python, SQL, JavaScript, CSS, and HTML.

Length: About 12 weeks
Time commitment: Roughly 10 to 20 hours per week
Level: Introductory

You do not need to work in IT to have a reason to understand cybersecurity. This CS50 course is built for technical and nontechnical learners and examines threats including phishing, social engineering, brute-force attacks, malware, ransomware, SQL injection, and denial-of-service attacks. It also covers passwords, multi-factor authentication, biometrics, encryption, firewalls, secure deletion, privacy, and the tradeoffs between security and convenience.

Length: 5 weeks
Time commitment: 2 to 6 hours per week
Level: Introductory

Education does not stop when a student walks out of the classroom. This Harvard Graduate School of Education course examines how families and educators can work together and what research says about the connection between family engagement and student outcomes. It covers what meaningful engagement looks like at home, at school, and in the community, along with practices educators can use to build stronger partnerships with families.

Length: 8 weeks
Time commitment: 2 to 4 hours per week
Level: Introductory

Scratch lets beginners program by dragging and dropping graphical blocks instead of immediately staring down a screen full of punctuation and code. Developed by the Lifelong Kindergarten Group at the MIT Media Lab, Scratch is also used at the beginning of Harvard's CS50. This course introduces programming ideas such as functions, events, conditions, loops, variables, and abstraction while students build animations, games, interactive art, and stories.

Length: 3 weeks
Time commitment: 2 to 6 hours per week
Level: Introductory

Happiness is more complicated than simply deciding to have a good day. Led by Harvard professor Arthur Brooks, this course looks at research from social science, positive psychology, neuroscience, and philosophy to examine what influences well-being. Students explore the roles of genetics, relationships, achievement, emotions, and behavior, then build strategies aimed at creating a more purposeful and satisfying life.

Length: 6 weeks
Time commitment: 2 to 3 hours per week
Level: Introductory

This one is for people whose reading list somehow never gets shorter. The course examines how major works of literature move between cultures and change as new audiences encounter them. Readings span thousands of years and include the Epic of Gilgamesh, Homer's Odyssey, The Tale of Genji, Voltaire's Candide, Orhan Pamuk's My Name Is Red, Lu Xun's Diary of a Madman, and Jorge Luis Borges' Ficciones.

Length: 12 weeks
Time commitment: 5 to 7 hours per week
Level: Introductory

Being persuasive involves considerably more than talking louder than everyone else. This course introduces American political rhetoric and teaches students how to build, analyze, and challenge arguments. It covers rhetorical devices, logical fallacies, persuasive writing, public speaking, and the differences between a strong argument and one that merely sounds convincing.

Length: 8 weeks
Time commitment: 2 to 3 hours per week
Level: Introductory

Cooking is chemistry and physics wearing an apron. Harvard researchers and prominent chefs use familiar foods and cooking techniques to explain scientific ideas involving elasticity, viscosity, heat, physical transformations, enzymes, baking, and emulsions such as mayonnaise. Students also get to treat their own kitchen like a laboratory, which is one of the more appealing ways to do homework.

Length: 16 weeks
Time commitment: 2 to 3 hours per week
Level: Introductory

Are we alone? Harvard's astronomy course approaches that enormous question through both biology and planetary science. Students look at how life may have arisen on Earth, how astronomers discover planets orbiting other stars, what conditions can make a planet potentially favorable for life, how planets change over time, and how scientists search for evidence of life elsewhere in the universe.

Length: 15 weeks
Time commitment: 5 to 8 hours per week
Level: Introductory

This course picks up where CS50 leaves off and moves deeper into building web applications. Students work with Python, JavaScript, SQL, HTML, CSS, Git, and the Django framework while learning about database design, scalability, security, application programming interfaces, interactive user interfaces, and deploying applications online. In other words, this one assumes you are ready to move beyond "Hello, world."

Length: 12 weeks
Time commitment: 6 to 9 hours per week
Level: Intermediate

This course explores how American constitutional democracy works and what role ordinary people can play in it. Topics include rights and responsibilities, constitutionalism, the philosophical foundations of democracy, civic participation, the ways democratic institutions change, and how people can express their views while engaging with perspectives different from their own. The goal is not to tell students what to believe, but to help them develop a more informed civic voice.

Length: 7 weeks
Time commitment: 1 to 3 hours per week
Level: Introductory

This history course uses 10 objects from Harvard's Schlesinger Library to examine the experiences of American women during the 20th century. Rather than treating history like a straight line from one famous person to the next, the course looks at how women pushed for new rights, challenged discrimination, adopted new technologies, pursued education, created art, and changed expectations in both public and private life.

Length: 8 weeks
Time commitment: 2 to 3 hours per week
Level: Introductory

The big distinction here is between taking a HarvardX course and earning a Harvard degree. Many of these classes can be audited online for free, giving learners access to course material without paying tuition. A verified certificate is optional on many courses and carries a separate fee that varies by class. Completing one does not make you a Harvard College graduate, but if the goal is simply to learn something from Harvard faculty without the Harvard tuition bill, there is plenty here to keep you busy.