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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You're in good company

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

Quick stats (trust us... mostly)

Learning without the boring bits.
236 k
facepalms recorded

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

884.4 k
AI study buddies dropped by

Learners weren't the only ones studying. Their favorite chatbots came looking for answers too.

14.4 k
Wi-Fi drops survived

When your connection dies but your determination doesn't. Knowledge finds a way.

18.2 k
celebratory dances after solving bugs

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

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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