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GeeksforGeeks Online Tutorials - FREE!

Last Updated : 11 Apr, 2025
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Welcome to GeeksforGeeks Online Tutorials! Here, we offer a huge selection of free online tutorials for everyone, no matter your experience level. This tutorials library is a comprehensive hub where you can easily find and access a variety of tutorials including web tutorials, data structures and algorithms, programming languages, computer science subjects, along with tutorial content for school students exam preparation and more!

Here is the comprehensive list of free online tutorials:

  • Data Structures and Algorithm
  • Programming Languages
  • Web Technology
  • Python Technologies
  • Data Science and Machine Learning
  • System Design Tutorial
  • DevOps Tutorial
  • School [Class 6 to 12]

Whether you're a beginner or an experienced professional, a college student or a school student, preparing for tech interviews or government exams - our collection of free tutorials offers something for everyone. These online tutorials allow you to learn at your own pace without any barriers.

Data Structures and Algorithm

Data Structures and Algorithms (DSA) provide techniques to organize data and solve computational problems with minimal time and space complexity. Here are in-depth DSA tutorials covering arrays, trees, graphs, sorting, dynamic programming, and more to help you build strong DSA fundamentals:

  • Complete DSA Tutorial
  • Arrays - Data Structure and Algorithm Tutorials
  • Strings - Data Structure and Algorithm Tutorials
  • Mathematical and Geometric Algorithms Tutorial
  • Stack - Data Structure and Algorithm Tutorials
  • Queue - Data Structure and Algorithm Tutorials
  • Linked List - Data Structure and Algorithm Tutorials
  • Hashing Tutorial
  • Set Tutorial
  • Recursion Tutorial
  • Sorting Techniques Tutorial
  • Searching Tutorial
  • Backtracking Tutorial
  • Tree Tutorial
  • Heap Tutorial
  • Greedy Algorithm Tutorial
  • Dynamic Programming (DP) Tutorial with Problems
  • Divide and Conquer Algorithm Tutorial
  • Segment Trees Tutorial
  • Branch and Bound Tutorial
  • Bitwise Algorithms Tutorial
  • Graphs Tutorial
  • Shortest Path Algorithm Tutorial with Problems
  • Design and Analysis of Algorithms

Programming Languages

From fintech and AI startups to top MNCs, mastering these programming languages lays the foundation for learning any tech stack. These tutorials cover everything from basic syntax to advanced topics, helping you become proficient in the most in-demand languages across industries:

  • C Programming Language Tutorial
  • C++ Tutorial
  • Python Tutorial
  • Java Tutorial
  • Android Tutorial
  • Learn C# Tutorial
  • SQL Tutorial
  • Scala Programming Language
  • Perl Programming Language
  • Golang
  • Kotlin Tutorial

Web Technology

Here are all the essential web technologies you need to build modern, responsive, and dynamic websites. From HTML, CSS, and JavaScript to frameworks like React, Angular, and backend tools like Node.js and Django—these tutorials cover both frontend and backend development in depth:

  • Web Development
  • Web Technology
  • HTML Tutorial
  • CSS Tutorial
  • JavaScript Tutorial
  • TypeScript Tutorial
  • JSON Tutorial
  • ReactJS Tutorials
  • Next.js Tutorial
  • Node.js Tutorial
  • Express.js Tutorial
  • Mongoose Tutorial
  • AngularJS Tutorial
  • PHP Tutorial
  • Web APIs Tutorial
  • WordPress Tutorial

Python Technologies

Here are all the Python-based technologies and frameworks used across web development, data science, AI, automation, and scripting. These tutorials cover everything from core Python to advanced tools like Django, Flask, Pandas, NumPy, TensorFlow, and more—helping you build scalable and intelligent applications:

  • Python Tutorial | Learn Python Programming Language
  • Django Tutorial
  • Flask Tutorial
  • Python Tkinter Tutorial
  • Matplotlib Tutorial
  • Python Seaborn Tutorial
  • Python Turtle Tutorial
  • PyGame Tutorial
  • Python Plotly Tutorial
  • Python Bokeh Tutorial
  • Learn DSA with Python | Python Data Structures and Algorithms

Data Science and Machine Learning

Here are all the key concepts, tools, and frameworks you need to excel in Data Science and Machine Learning.:

  • NumPy Tutorial – Python Library
  • Pandas Tutorial
  • Data Analysis Tutorial
  • Data Visualisation Tutorial
  • Data Science With Python Tutorial
  • AI Tutorial
  • Machine Learning Algorithms
  • Machine Learning Tutorial
  • OpenCV Python Tutorial
  • Deep Learning Tutorial
  • Natural Language Processing (NLP) Tutorial
  • Computer Vision Tutorial
  • R Language Tutorial
  • TensorFlow Tutorial
  • Pytorch Tutorial
  • LightGBM Tutorial
  • CatBoost Tutorial
  • Scikit Learn Tutorial

System Design Tutorial

Here are all the essential topics to help you master system design for scalable and high-performance applications. These tutorials cover design principles, architecture patterns, load balancing, caching, database sharding, CAP theorem, and real-world system design case studies used in top tech companies:

  • System Design Tutorial
  • Software Design Patterns Tutorial
  • Software Development | Introduction, Roadmap, Courses
  • Search Engine Optimization | SEO: A Complete Reference
  • SAP – Systems Applications and Products 
  • The Ultimate Guide to Product Management | Beginner to Advanced

DevOps Tutorial

Here are all the essential DevOps tools, practices, and cloud platforms you need to streamline development and operations. With these tutorials, learn version control with Git, complete Linux commands, CI/CD pipelines and cloud services like AWS, Azure, and Google Cloud—helping you build, deploy, and manage applications at scale:

  • Devops Tutorial
  • Linux/Unix Tutorial
  • Git Tutorial
  • Kubernetes Tutorial
  • Docker Tutorial
  • Amazon Web Services (AWS) Tutorial
  • Google Cloud Platform Tutorial
  • Microsoft Azure Tutorial

School [Class 6 to 12]

Here are subject-wise resources for students from Class 6 to 12, designed to strengthen concepts, improve academic performance, and support exam preparation with simplified explanations and solved examples:

  • School Programming
  • Maths
  • Physics
  • Chemistry
  • Social Science

No matter what you're aiming to learn—whether it's preparing for coding interviews, mastering programming languages, or building strong fundamentals—these are complete tutorials designed to give you in-depth knowledge and real, industry-level experience. Learn at your own pace, revisit topics anytime, and gain the skills you need to succeed. Start exploring, keep learning, and take full advantage of everything GeeksforGeeks offers—completely free


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