Master the Technology of Today, for Free

OpenCS is Aalto University's open online platform offering free computer science courses for anyone, anywhere. Whether you're starting your journey in tech or expanding your skills, you'll find high-quality, university-level learning at your fingertips.

Study at your own pace, mostly with no strict deadlines. The courses are open for learning free of charge, and everyone worldwide can gain valuable, practical knowledge in topics ranging from web development to modern programming languages.

Since July 16, 2026, OpenCS courses can still be studied freely, but they no longer provide official Aalto credits for non-Aalto learners. Aalto students should always check SISU and MyCourses for the most up-to-date information on the courses.

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Join tens of thousands of learners from a range of organizations, including...
Raseko (Raisio Region Education) Laurea University of Applied Sciences Yle Ekky (South Karelia Education) Helsinki schools Kesko Seinäjoki University of Applied Sciences (SeAMK) University of Lapland Visma City of Helsinki Nokia Lahti / EduLahti Raseko (Raisio Region Education) Laurea University of Applied Sciences Yle Ekky (South Karelia Education) Helsinki schools Kesko Seinäjoki University of Applied Sciences (SeAMK) University of Lapland Visma City of Helsinki Nokia Lahti / EduLahti
South-Eastern Finland University of Applied Sciences (XAMK) Lapland University of Applied Sciences University of Vaasa LAB University of Applied Sciences ABB Tampere schools Espoo schools University of Oulu University of Eastern Finland (UEF) Tuxera Häme University of Applied Sciences (HAMK) South-Eastern Finland University of Applied Sciences (XAMK) Lapland University of Applied Sciences University of Vaasa LAB University of Applied Sciences ABB Tampere schools Espoo schools University of Oulu University of Eastern Finland (UEF) Tuxera Häme University of Applied Sciences (HAMK) South-Eastern Finland University of Applied Sciences (XAMK) Lapland University of Applied Sciences University of Vaasa LAB University of Applied Sciences ABB Tampere schools Espoo schools University of Oulu University of Eastern Finland (UEF) Tuxera Häme University of Applied Sciences (HAMK) South-Eastern Finland University of Applied Sciences (XAMK) Lapland University of Applied Sciences University of Vaasa LAB University of Applied Sciences ABB Tampere schools Espoo schools University of Oulu University of Eastern Finland (UEF) Tuxera Häme University of Applied Sciences (HAMK)
University of Turku Metropolia University of Applied Sciences Hanken School of Economics Kajaani University of Applied Sciences (KAMK) Jamk University of Applied Sciences University of Jyväskylä Satakunta University of Applied Sciences (SAMK) Omnia (Espoo education provider) Jedu (Vocational School) Oulu University of Applied Sciences Alma Media University of Turku Metropolia University of Applied Sciences Hanken School of Economics Kajaani University of Applied Sciences (KAMK) Jamk University of Applied Sciences University of Jyväskylä Satakunta University of Applied Sciences (SAMK) Omnia (Espoo education provider) Jedu (Vocational School) Oulu University of Applied Sciences Alma Media University of Turku Metropolia University of Applied Sciences Hanken School of Economics Kajaani University of Applied Sciences (KAMK) Jamk University of Applied Sciences University of Jyväskylä Satakunta University of Applied Sciences (SAMK) Omnia (Espoo education provider) Jedu (Vocational School) Oulu University of Applied Sciences Alma Media University of Turku Metropolia University of Applied Sciences Hanken School of Economics Kajaani University of Applied Sciences (KAMK) Jamk University of Applied Sciences University of Jyväskylä Satakunta University of Applied Sciences (SAMK) Omnia (Espoo education provider) Jedu (Vocational School) Oulu University of Applied Sciences Alma Media
Karelia University of Applied Sciences SSKKY (Satakunta Vocational Education) Centria University of Applied Sciences Aalto University University of Helsinki Åbo Akademi University Haaga-Helia University of Applied Sciences Turku University of Applied Sciences (Turku AMK) Uniarts Helsinki (University of the Arts Helsinki) Tampere University Lappeenranta-Lahti University of Technology (LUT) Karelia University of Applied Sciences SSKKY (Satakunta Vocational Education) Centria University of Applied Sciences Aalto University University of Helsinki Åbo Akademi University Haaga-Helia University of Applied Sciences Turku University of Applied Sciences (Turku AMK) Uniarts Helsinki (University of the Arts Helsinki) Tampere University Lappeenranta-Lahti University of Technology (LUT) Karelia University of Applied Sciences SSKKY (Satakunta Vocational Education) Centria University of Applied Sciences Aalto University University of Helsinki Åbo Akademi University Haaga-Helia University of Applied Sciences Turku University of Applied Sciences (Turku AMK) Uniarts Helsinki (University of the Arts Helsinki) Tampere University Lappeenranta-Lahti University of Technology (LUT) Karelia University of Applied Sciences SSKKY (Satakunta Vocational Education) Centria University of Applied Sciences Aalto University University of Helsinki Åbo Akademi University Haaga-Helia University of Applied Sciences Turku University of Applied Sciences (Turku AMK) Uniarts Helsinki (University of the Arts Helsinki) Tampere University Lappeenranta-Lahti University of Technology (LUT)

Quick stats (trust us... mostly)

Learning faster than your Wi-Fi drops out.
43.8 k
AI-generated code apologies accepted

The chatbot was very sorry about the nonexistent library it confidently imported.

18.2 k
celebratory dances after solving bugs

Awkward shuffles, victory fist-pumps, and full-blown TikTok routines. Debugging deserves celebration.

236 k
facepalms recorded

Triggered by bugs, typos, and the classic: forgetting to save before running.

14.5 k
questions asked (and most of them answered)

No such thing as a dumb question. Except maybe one or two.

Courses

Choose from a variety of courses designed by instructors at Aalto University.
5cr / EN
Introduction to Programming

Master the basics of programming with Python, and learn how to work effectively with generative AI tools in programming.

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5cr / EN
Databases

Data runs the digital world. Learn databases, SQL, schema design, and how data powers real applications.

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5cr / EN
Web Software Development

Learn how to create web applications with Svelte and Deno. This course covers both client- and server-side development, with a focus on practical skills. These materials are available until the end of 2026.

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5cr / EN
Modern and Emerging Programming Languages

Create your own programming language, learning Rust on the side.

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1cr / EN
Introduction to Large Language Models

Learn what language models are, how they work, and how to use them efficiently. At the same time, also reflect on the societal impacts of these models.

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2cr / EN
Software Engineering with Large Language Models

Learn how to use large language models in software engineering work and how to build small LLM-powered applications.

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