Data Structures and Algorithm Free Online Course with Certification [2025]

Mastery of data structures and algorithms (DSA) has become a non-negotiable skill for aspiring software engineers and developers. According to recent reports, the global demand for software developers is projected to grow by 17% by 2033, making this skill set a career catalyst​.

And guess what? You don’t need to break the bank to acquire these skills. Many platforms now offer a free DSA course with certificates, allowing you to learn and validate your expertise without financial barriers.

This article explores the top 12 free DSA courses with certificates, highlighting platforms, course content, and unique features to help you kickstart or enhance your software development and programming journey. Keep reading to find the perfect course!

Top 12 Free DSA Courses with Certificate in 2025

Data Structures and Algorithms (DSA) are foundational concepts in computer science and software development. Gaining expertise in DSA not only strengthens your problem-solving skills but also opens doors to opportunities in top tech companies.

Here’s a curated list of some of the best data structures and algorithms free course with certificate. Each course is designed to cater to diverse learning styles, whether you are a visual learner, prefer hands-on practice, or enjoy theoretical explanations. 

1. upGrad’s Data Structures & Algorithms 

upGrad's Data Structures & Algorithms course is your gateway to mastering essential DSA concepts like arrays, linked lists, stacks, queues, and sorting algorithms. Designed for beginners, this 50-hour course helps you build a strong foundation through a structured problem-solving approach. 

By completing the course, you earn a certificate that strengthens your resume and boosts your technical credentials.

Key Features

• You gain access to 50 hours of self-paced, engaging learning.
• The course covers essential DSA topics, including arrays, stacks, queues, and sorting algorithms.
• You follow a structured problem-solving methodology to develop practical skills.
• Free enrollment ensures accessibility without financial barriers.
• You receive a shareable certificate to enhance your professional profile.
• Benefit from industry insights and expert-curated content.

Why Choose This Course?

• You’ll find it beginner-friendly, perfect for starting your DSA journey.
• Flexible learning schedules allow you to study at your convenience.
• The course prepares you for technical interviews and programming challenges.
• Completing it adds a recognized certificate to your resume.
• You can explore advanced paid programs for deeper expertise.
• You’re learning with upGrad, trusted by over 10 million learners, offering 200+ courses, and partnered with 1,400+ hiring companies.

Also Read: What are Data Structures & Algorithm?

2. Data Structure - Part I Udemy Course

The Data Structure - Part I course on Udemy introduces you to the fundamentals of data structures and algorithms through Java programming. With over five hours of engaging content, you’ll master essential concepts like arrays, linked lists, dynamic arrays, and stacks. 

The course emphasizes practical learning through live coding examples and an introduction to runtime analysis and time complexity.

Key Features

• Over five hours of free, beginner-friendly content on data structures.
• Focused lessons on arrays, linked lists, dynamic arrays, and stacks.
• Practical coding demonstrations to help you implement concepts in real-time.
• Introduction to algorithm runtime analysis and time complexity.

Why Choose This Course?

• You’ll gain foundational knowledge essential for coding interviews and competitive programming.
• The course is ideal for Java learners wanting to improve their programming skills.
• Hands-on coding examples ensure you can apply concepts effectively.
• With over 40,000 students enrolled, it’s a proven resource for beginner programmers.

Also Read: Data Structures in Javascript Explained: Importance, Types & Advantages

3. Algorithms Part 1 [Coursera]

The Algorithms Part 1 course on Coursera provides a deep dive into fundamental data structures, algorithms, and complexity analysis. Taught by Princeton University’s Kevin Wayne and Robert Sedgewick, this course covers sorting, searching, and basic data structures with Java and Big O notation.

Key Features

• Taught by Princeton University instructors Kevin Wayne and Robert Sedgewick.
• Focuses on essential algorithms like sorting and searching, along with basic data structures.
• Uses Java programming and Big O notation for hands-on learning.
• Rated 4.9 stars by over 1,000 learners, reflecting its exceptional quality.

Why Choose This Course?

• You’ll learn from world-class instructors with unmatched expertise in algorithms.
• The course offers rigorous content, ideal for deepening your understanding of DSA.
• It’s a perfect starting point for mastering algorithms and complexity analysis.

Also Read: Top Software Developer Skills You Need to Have: How to Improve them

4. A Visual Introduction to Algorithms [Course from Educative]

This free DSA course with certificate offers an engaging, visual approach to learning algorithms. You’ll explore searching, sorting, recursion, and graph theory using visual aids, real-world examples, and hands-on coding challenges in multiple programming languages.

Key Features

• Unique visual aids simplify algorithm concepts like searching, sorting, and recursion.
• Focuses on real-world applications, such as shortest-path and airline route problems.
• Offers hands-on coding in Java, Python, C++, and JavaScript.
• Includes quizzes and exercises to reinforce your learning.

Why Choose This Course?

• You’ll learn through an interactive, visual approach instead of theory-heavy lessons.
• The course connects algorithms to practical, real-world scenarios.
• Multiple language support lets you code in your preferred programming language.
• Fun and engaging exercises keep your learning experience enjoyable and effective.

Also Read: Data Structures in Python

5. Learn Data Structures on Boot.dev

Learn Data Structures on Boot.dev offers an interactive, gamified experience for mastering data structures in Python. Perfect for beginners and intermediate coders, this course combines fun challenges with hands-on coding to make learning engaging and practical.

Key Features

• Gamified lessons with a fantasy-themed twist to make learning enjoyable.
• Focus on Python-based data structure concepts, ideal for coding interviews.
• Hands-on exercises reinforce your understanding at every step.
• Designed for both beginners and intermediate learners.

Why Choose This Course?

• You enjoy an adventure-like learning experience with engaging challenges.
• The course makes data structures easy to grasp and practice effectively.
• Perfect preparation for coding interviews and job-oriented software development skills.
• Boot.dev’s gamified format ensures you stay motivated throughout the course.

6. Google Coding Interviews on Data Structure and Algorithms on Udemy

This free DSA course with certificate on Udemy is ideal for preparing for competitive programming and FAANG interviews. It focuses on mastering dynamic programming, recursion, iteration, and essential problem-solving strategies.

Key Features

• Covers dynamic programming, recursion, iteration, and key interview topics.
• Helps build intuition for solving unseen problems effectively.
• Offers strategies for understanding algorithms beyond memorization.
• Focused on preparing for FAANG and other top-tier tech interviews.

Why Choose This Course?

• You gain a deep understanding of techniques frequently tested in coding interviews.
• The course equips you with the skills to excel in competitive programming.
• You’ll develop problem-solving strategies for dynamic programming challenges.
• Perfect for those targeting tech giants like Google, Amazon, and Meta.

7. Data Structure and Algorithms Using C, C++, Java, Python on Udemy

The Data Structures and Algorithms Using C, C++, Java, Python course on Udemy offers a beginner-friendly introduction to DSA concepts. Covering multiple languages, it teaches arrays, linked lists, stacks, queues, trees, and graphs through practical examples.

Key Features

• Covers DSA concepts in C, C++, Java, and Python.
• Focuses on arrays, linked lists, stacks, queues, trees, and graphs.
• Includes hands-on coding examples and real-world applications.
• Offers MCQs and problem-solving sessions for knowledge reinforcement.

Why Choose This Course?

• You learn DSA concepts across multiple programming languages in one course.
• Practical examples simplify complex topics, making them easy to understand.
• The course fits your schedule with just 1 hour and 52 minutes of content.
• Ideal for building a strong foundation in DSA with interactive learning tools. 

Looking to boost your programming skills? Explore this Free Python Course with Certificate to master Python basics and earn a certificate to showcase your expertise!

8. Data Structures Concepts & Singly Linked List Implementation on Udemy

This free DSA course with certificate on Udemy is a concise program focused on mastering basic data structures in C programming. It emphasizes arrays, stacks, queues, deques, and the singly linked list through hands-on coding.

Key Features

• Covers essential data structures like arrays, stacks, queues, and deques.
• Focuses on singly linked list operations, including adding, deleting, and traversing nodes.
• Practical lessons tackle real coding challenges like manipulating linked list nodes.
• Short and targeted content, perfect for quick learning.

Why Choose This Course?

• You’ll gain hands-on coding skills for implementing and manipulating linked lists.
• Ideal for beginners looking to strengthen their C programming fundamentals.
• Practical examples ensure concepts are easy to apply in real scenarios.
• Focused on coding challenges, making it highly interactive and engaging.

9. Introduction to Algorithms and Data Structures in C++ on Udemy

The Introduction to Algorithms and Data Structures in C++ course on Udemy, led by coding expert Andrei Margeloiu, teaches fundamental data structures and practical problem-solving techniques. It simplifies complex topics using visual aids and diagrams.

Key Features

• Covers arrays, stacks, queues, and algorithmic problem-solving techniques.
• Simplifies Big O notation and algorithmic complexity with visual aids.
• Offers practical insights from a coding competition expert.
• Designed for both beginners and those polishing their skills.

Why Choose This Course?

• You learn directly from an expert with experience solving thousands of algorithmic problems.
• The course breaks down complex concepts into digestible lessons.
• Ideal for improving problem-solving skills in C++ programming.
• Free, accessible, and perfect for competitive programming preparation.

10. Data Structures in Java for Beginners on Udemy

This free DSA course with certificate on Udemy provides a beginner-friendly introduction to mastering singly and doubly linked lists. You’ll learn key operations like adding, deleting, and traversing nodes through hands-on practice.

Key Features

• Covers singly and doubly linked lists in Java.
• Teaches essential operations: adding, deleting, and traversing nodes.
• Focused and concise lessons for quick understanding.
• Hands-on coding practice for reinforcing concepts.

Why Choose This Course?

• Perfect for beginners aiming to master linked lists in Java.
• Practical lessons ensure you can apply concepts confidently.
• Short duration makes it easy to fit into a busy schedule.
• Builds strong fundamentals for further exploration in Java programming.

11. Data Structures & Algorithms in Python - Coding Interview (Free) on Udemy

The Data Structures & Algorithms in Python - Coding Interview course on Udemy is a concise, hands-on program for interview preparation. Covering key topics like arrays, trees, and queues, it sharpens your problem-solving skills in just 1.5 hours.

Key Features

• Covers foundational topics: arrays, linked lists, trees, stacks, and queues.
• Practical coding challenges to enhance problem-solving skills.
• Tips and tricks from experienced instructor Akash Sachdeva.
• Quick 1.5-hour crash course for focused preparation.

Why Choose This Course?

• Ideal for a fast yet thorough review of Python-based data structures.
• Perfect for interview prep with real coding challenges included.
• Designed for time-efficient learning without sacrificing quality.
• Trusted by over 20,000 students and is currently free for learners.

Also Read: Top 58 Coding Interview Questions & Answers 2024 [For Freshers & Experienced]

12. Data Structures And Algorithms In Real World - Part 1 (Free Course on Udemy)

The Data Structures and Algorithms in Real World - Part 1 course on Udemy introduces practical applications of DSA concepts like the Merkle tree. You’ll build a mini version of Git in JavaScript, connecting theory with real-world use cases.

Key Features

• Focuses on implementing Merkle trees, a key blockchain concept.
• Teaches you to build a mini Git version in JavaScript.
• Concise 1 hour and 20 minutes of engaging, practical content.
• Taught by Anto Aravinth, rated 4.5/5 by learners.

Why Choose This Course?

• You gain hands-on experience with real-world DSA applications.
• Perfect for understanding blockchain-related data structures.
• Ideal for students, professionals, and interview preparation.
• With over 3,600 students enrolled, it’s a trusted resource for learning.

upGrad’s Exclusive Data Science Webinar for you –

ODE Thought Leadership Presentation

Why Learn a Free DSA Course with Certificate?

Mastering Data Structures and Algorithms (DSA) is essential for any aspiring developer. A free DSA course with a certificate provides a structured learning path, boosts your credibility, and makes you stand out in the competitive job market without any financial investment. 

Here are some of the key benefits of enrolling in a free DSA course with a certificate.

• Interviews:

  A solid grasp of DSA helps you confidently tackle complex coding problems, making you stand out in technical interviews.

• Efficiency:

  DSA mastery enables you to write optimized, efficient code with reduced time complexity.

• Scalability:

  Strong DSA knowledge ensures you can design scalable solutions that handle growing data and user demands seamlessly.

• Salary:

  Expertise in DSA is highly valued, directly linking to high-demand job roles with attractive compensation.

• Problem-Solving:

  DSA sharpens your ability to break down complex problems and find optimal solutions efficiently.

• Improved Coding Skills:

  Practicing DSA enhances your coding abilities, fostering cleaner, more efficient code and better debugging skills.

Also Read: 13 Best Data Structure Projects Ideas and Topics For Beginners [2024]

What You’ll Learn in the Data Structures and Algorithms Free Course with Certificate?

The free DSA course offers an engaging, hands-on approach to mastering both the foundational and advanced concepts of data structures and algorithms. 

The course's interactive assignments and coding challenges will reinforce your understanding and help you gain practical experience to apply your knowledge in coding interviews and beyond. Let’s take a closer look at what you’ll learn in a free DSA course. 

Basics of Data Structures

This section introduces you to the foundational data structures, including arrays, linked lists, stacks, and queues. You'll learn how each structure operates, its strengths and limitations, and when to use them in different problem-solving scenarios. 

By mastering these basics, you'll build a strong foundation that supports more advanced topics in programming and system design.

Fundamentals of Algorithms

Here, you’ll dive into key algorithms like sorting, searching, and recursion. The focus is on understanding how these algorithms work, optimizing their implementation, and analyzing their time complexity. 

This section equips you with the knowledge to write efficient code and tackle algorithmic challenges confidently, whether for projects or technical interviews.

Assignments

To reinforce your learning, the course offers practical assignments that replicate real-world coding challenges. These hands-on exercises enable you to apply the concepts you've learned and solve problems effectively. 

By completing these assignments, you’ll gain confidence and readiness to tackle similar challenges in professional environments.

With a strong foundation in these fundamental concepts, you're ready to explore an opportunity that combines expert guidance and hands-on learning to elevate your DSA skills further.

Take upGrad's Free DSA Course with Certificate

Boost your problem-solving skills and prepare for technical interviews with upGrad's free 50-hour Data Structures and Algorithms course. This self-paced, online course covers essential topics such as algorithm analysis, time complexity, arrays, queues, stacks, and sorting/searching algorithms.

Key Highlights:

• Free Certificate: Earn a certificate upon completion
• 100% Online: Learn at your own pace, from anywhere
• Real-time Upskilling: Build skills that matter in the tech industry
• Duration: 50 hours of in-depth learning

What You'll Learn:

• Time Complexity & Algorithm Analysis
• Sorting & Searching Algorithms
• Basic Data Structures (Arrays, Linked Lists, Stacks, Queues)

This course is your pathway to mastering the fundamentals of software engineering and acing your next technical interview. Register now and get started on your upskilling journey! 

Conclusion

In a world where coding interviews can feel like a puzzle game on hard mode, mastering Data Structures and Algorithms (DSA) is your cheat code to success. The free DSA courses we've rounded up are your ticket to leveling up—offering hands-on experience, certifications that make your resume shine, and skills that’ll make you a problem-solving pro. 

Whether you’re just getting started or aiming for DSA mastery, these courses are the perfect companions on your path to becoming a coding legend!

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References:
https://fortune.com/education/articles/software-engineering-jobs/