Online Coding Courses That Will Improve Your Coding Skills

Written By21k school Team
Last Updated on11 Jun, 2025
Min Reading10 min read

The growth of technology is growing at a rate we have never seen before, which is changing almost all aspects of society including productivity, business, and communication.

They ran the gamut from artificial intelligence to Blockchain which is affecting industries across the globe. However, there has yet been one thing that has not changed — coding. 

It is the core of all the innovations, a universally applicable know-how because it connects the conception and the implementation stage.

Be you new to programming, or a programmer interested in enhancing your existing knowledge, now you can simply enrol in an online coding course to practice coding.

In this blog, you are going to learn what online coding courses are, as well as enlist some platforms that provide these courses, talk about the types of coding, and finally, listen to why coding is a must-learn skill nowadays.

What is an Online Coding Course?

An online coding course is a systematic set of learning activities that will facilitate the acquisition of programming languages, tools, or concepts over the World Wide Web.

Think of these courses as video lessons, practice quizzes, coding problem-solving sessions or project-focused practicums. 

Open to anyone, online coding courses are available for learners of all certain levels and teach almost any programming language, from Python to Java to JavaScript and more.

They are the perfect fit for students or anybody who requires flexibility in their learning while practising other activities like work or studying.

Read the blog and and learn about different sites for coding Best Coding Websites For Kids 

Best Online Coding Courses

There are various e-learning platforms that offer coding courses to students. These platforms use online interactive methods and provide students with advanced programming languages.

The best coding courses online have been compiled below to help you opt for the best course.

Some of them are open sources while some are paid and all the apps highlighted here are top-notch.

1. Codecademy

Codecademy is an online platform which offers engaging coding lessons in a wide range of programming languages and technologies. 

In addition to topics like data science web development and machine learning, it provides classes in Python, JavaScript, Ruby, HTML and CSS.

This program provides individuals with a friendly user interface that is suitable for both new learners and advanced coders. 

Codecademy is an umbrella where you will find many coding courses with an increasing level of difficulty for beginners.

Courses Offered:

  • Web Development: HTML, CSS, and JavaScript: it is high time you memorised those terms.
  • Data Science: You’ll jump into programming with Python, as well as SQL, and use tools for data visualization.
  • Computer Science: Learn algorithms, data structure, and everything in between.
  • Programming Languages: Explore Python, Java, and C++.

Key Features:

  • Interactive Learning: Coding directly in the browser with instant feedback, no installation required.
  • Skill Paths: Employment tracks corresponding to particular niches, for example, front-end development or data analysis.
  • Certification: Get certificates to showcase your expertise.
  • Pro Plan: Includes extra projects, quizzes, and career options.

Fees:

  • Free courses available.
  • Pro plan: Beyond being cost-effective, the website offers additional learning tools for as low as $19.99 per month.

Learn what is the Importance of Coding in 21st Century Education so that you can keep yourself updated with it

2. Khan Academy

Khan Academy is a popular online learning platform that provides various courses and exam preparation. Along with that, it also offers various coding courses and programming classes. 

As one of the providers of absolutely free coding courses, Khan Academy relies on the provision of high-quality educational resources.

Courses Offered:

  • Introduction to JavaScript: They include coverage of programming basics.
  • HTML/CSS: Build websites from scratch.
  • SQL: Learn database management.

Key Features:

  • Free Access: Degree programs are mostly tuition free with no additional costs.
  • Beginner-Friendly: These very basic lessons are designed for people who have no previous experience whatsoever.
  • Certification: Again not an accredited school and therefore cannot assist towards a degree or diploma.
  • Supportive Community: Online surveys and discussions in particular and interpersonal communication in general.

Fees:

  • Free for all users.

For Parents, Why You Should Teach Your Child Coding From An Early Age and keep your kid updated with essential skill

3. Coursera

Coursera is an online learning platform which provides a range of coding courses covering web development and programming languages.

Coursera provides learning materials related to Java, C and C++ in an easy method. 

It offers professional-grade coding courses, and it partners with universities and companies while doing so.

Courses Offered:

  • Python for Everybody (University of Michigan): Comprehensive Python programming.
  • Full Stack Web Development: Incorporates basic programming with HTML, CSS, and JavaScript up to frameworks.
  • Machine Learning: An overview of AI and data science.

Key Features:

  • Top-Tier Instructors: Classes created by industry specialists and university teachers.
  • Flexibility: Study at your own convenience while having choices of due dates available.
  • Capstone Projects: Engage on real-life projects for hands-on experience.
  • Certificates: Professional Certifications to give that solid push to your resume.
  • Financial Aid: Available for many courses.

Fees:

  • Professional certificates: Start at $49 per month, plus a 7-day free trial
  • Guided projects: Start at $9.99
  • Single courses:  As for the price, many courses are free of charge
  • Coursera Plus: This service costs $59 per month or $399 per year, providing members with unlimited access to more than 7,000 courses, projects and certificate programmes.

4. Udemy

Udemy is a popular online learning platform that provides various courses and skill-based learning.

One popular platform for learning to code and program, which offers a large library of courses that cater to various skill levels and programming languages. 

With regard to coding, Udemy is well-stocked with courses of varying levels of difficulty in countless fields of interest.

Courses Offered:

  • The Complete JavaScript Course:  For newbies to advanced software developers.
  • Learn- HTML & CSS, JavaScript, Git, Ruby, Ruby on Rails, C++, C#, Java, and more
  • Web Development Masterclass:  Learn front-end development as well as back-end development.
  • Courses- Coding courses above 10,000.

Key Features:

  • Affordable Pricing: Regular discounts and deals.
  • Lifetime Access:  Courses bought need not be taken at a particular time.
  • Variety: Things like workshops, lectures, and other subjects that may be really specific such as game development or blockchain.
  • Instructor Support: Enough of instructors and their input; it is time to hear from the course makers themselves.
  • Certification: Avail certificates after the end of the course.

Fees:

5. edX

edX is an online learning platform that provides a vast array of excellent course programs and degrees from renowned universities and institutions worldwide.

Edx provides various online coding courses prepared by top International institutes. edX offers university courses with assistance from standard learning institutions such as MIT and Harvard.

Courses Offered:

  • CS50’s Introduction to Computer Science: Introduction to Computer Science is a course offered by Harvard University.
  • Python & more: Know with Python skills, JavaScript, HTML, Java and many others.
  • Java Programming and Software Engineering: From Duke University.

Key Features:

  • Academic Excellence: Programs from the world’s leading universities.
  • Variety: Web development, data science, software engineering programs.
  • MicroMasters: Postgraduate courses that lead to employability mainstreams.
  • You can achieve a professional certificate depending on the course you choose
  • Run by Harvard and MIT

Fees:

  • Free to audit courses.
  • Verified certificates: $50 to $300/course.

6. freeCodeCamp

The nonprofit group freeCodeCamp offers a comprehensive, cost-free online learning environment for people interested in web development and programming.

In addition to many other topics, its well-structured curriculum covers data visualisation, HTML, CSS, and JavaScript.  

freeCodeCamp is an organisation with a mission to attract people and provide them with free coding classes to give them a chance to become better and work for companies all around the world.

Courses Offered:

  • Responsive Web Design: HTML, CSS, and web layouts.
  • JavaScript Algorithms and Data Structures: Be well aware of programming basics.
  • Machine Learning with Python: Dive into AI development.
  • Take courses in: JavaScript, Git, Ruby, Databases, Ruby on Rails, NodeJS

Key Features:

  • Completely Free: Members are provided free access to courses and certification of different vocational studies.
  • Self-Paced Learning: Progress at your own speed.
  • Hands-On Projects: Create works for the portfolio.
  • Open Source: Participation from developers across the world helps deliver quality products.

Fees:

  • Entirely free

7. MIT OpenCourseWare

The Massachusetts Institute of Technology (MIT) launched the MIT OpenCourseWare (OCW) initiative, which offers open and free access to a variety of MIT course materials.

This provides various coding courses and programming languages such as Java, CSS, C++ and so on. MIT OpenCourseWare provides free access to lecture materials from MIT courses.

Courses Offered:

  • Learn: Python, Java, C and C++, MATLAB, Computational Thinking, Data Science and more
  • Artificial Intelligence: Advanced topics in AI.
  • Algorithms and Data Structures: Core programming concepts.

Key Features:

  • World-Class Content: Straight from MIT’s curriculum.
  • Free Resources: Includes lectures, assignments, and exams.
  • Advanced Learning: Ideal for professionals and advanced learners.
  • Supplemental Materials: Downloadable course materials for offline use.
  • Self-Paced: Learn at your convenience.

Fees:

  • Free for all users.

8. GitLab

GitLab is an online platform that offers a ton of tools for version control project management and collaboration.

It makes it possible for teams working on development and operations security to create better software faster. 

Gitlab provides continuous integration, deployment, code reviews, and tracking of problems.

Courses Offered:

  • Learn: DevOps, CI/CD, Git, Java, C and C++, Data Science, Project management and more
  • Artificial Intelligence: Advanced Topics in AI and Machine Learning
  • Algorithms and Data Structures: Core programming concepts.

Key Features

  • AutoDavs: Automated coding, building and deployment, Auto test and code generation.
  • Free Resources: Includes lectures, assignments, and resources
  • Professional Learning: Ideal for professionals and beginners.
  • Supplemental Materials: Downloadable course materials for offline use.

Fees

  • Gitlab has three plans: Free, Premium and Ultimate
  • Free of Cost
  • Premium: $29/month
  • Ultimate: Contact Sales

9. HackerRank

HackerRank, a flexible coding platform, offers a range of coding challenges, contests and interview preparation resources. 

The objective of this program is to assist developers in honing their coding abilities and getting ready for technical interviews.

HackerRank also helps companies identify and assess technical skills and concepts.

Courses Offered:

  • Learn: JavaScript, Java, Python, React, Angular, CSS, Go, Node.js, SQL and so on.
  • Certification: Advanced certification, problem solving and AI.
  • Algorithms and Data Structures: Core programming concepts and AI integration.

Key Features

  • Customisable: Customised and tailored content, automated code development
  • Resources: Contains assignments, tests, and coding resources
  • Learning: Good for businesses and  Individuals with new learners and professionals.

Fees

  • Hackerrank offers a free and a premium version
  • Premium Subscription of 129$/year

10. LeetCode

One of the most well-known coding platforms is LeetCode, which is renowned for its vast library of coding problems and challenges covering everything from databases to algorithms to data structures. 

Developers frequently use it to get ready for technical interviews at leading tech firms. 

Courses Offered:

  • Courses: Arrays, strings, linked lists, stacks, queues, trees, graphs, heaps, greedy algorithms, binary search, SQL, etc.
  • Artificial Intelligence and Machine Learning: Advanced Topics in AI and Machine Learning

Key Features

  • Cheat Sheets: LeetCode provides cheat sheets that highlight important ideas and provide answers to frequently asked questions. 
  • Categorised Learning: Ideal for professionals and beginners provides easy, medium, and hard.
  • Supplemental Materials: ideas that are pertinent to software development and interviews. 

Fees

  • Leetcode has two plans: Monthly and Yearly
  • Premium: $35/month
  • Premium: $159/month

11. Codewars

Codewars is an online platform that provides kata or coding challenges for programmers to practice and boost their skills

It offers a gamified setting where users can compete with each other, solve puzzles and earn ranks. It is a popular platform among students and teachers.

Courses Offered:

  • Courses: Java Script, JAVA, Python, C+, SQL, etc.
  • Artificial Intelligence and Katas: Advanced Concepts of AI and basics of Katas.

Key Features

  • Gamification: Coderwars uses gamified learning which makes it simple and easier to understand.
  • Categorised Learning: Ideal for professionals and beginners provides easy, medium, and hard.
  • Kata Problems: Kata involving discrete programming that are intended to teach particular coding methods. 
  • Multiple Language: Codewars supports multiple programming languages such as Java, Python, C+, etc.

Fees

  • Codewars has two plans: Free and Subscription Based
  • Premium: $5/month

12. Roblox 

Roblox is an online platform where users can create and play games created by other users

It provides a wide range of game development tools and coding programs that enable users to make their own games and software.

Roblox is well-liked by people of all ages but especially by children and teenagers

Courses Offered:

  • Courses: Designing, Lua, 3d modeling Scripting, and game design.

Key Features

  • Game Designing: Different facets of game design, including level design, UI/UX design and game monetization,
  • Visual Art: Textures and graphics are among the visual assets created for Roblox games that are covered in the courses.
  • Ideal: Ideal for beginners and kids to learn coding and game designing.

Fees

  • Roblox is free and subscription based 
  • Subscription: $4.99/month
  • Master Subscription: $50 one time subscription

What are the Different Types of Coding?

Coding encompasses various programming languages and frameworks tailored for specific tasks. Here’s an overview of the most popular types:

1. HTML & CSS

  • Purpose: The backbone of web development. HTML structures web content, while CSS styles it.
  • Use Cases: Website design, front-end development.
  • Learning Curve: Beginner-friendly, ideal for those new to coding.

2. JavaScript

  • Purpose: Adds interactivity to websites and web applications.
  • Use Cases: Dynamic content, games, and real-time updates.
  • Popularity: Widely used in front-end and back-end development.

3. Python

  • Purpose: A versatile language known for its simplicity.
  • Use Cases: Data science, AI, web development, and scripting.
  • Popularity: A favourite among beginners and professionals.

4. Java

  • Purpose: A robust language used for building large-scale applications.
  • Use Cases: Mobile apps, enterprise software, and web development.
  • Stability: Ideal for long-term projects requiring scalability.

5. C and C++

  • Purpose: The foundation of many modern programming languages.
  • Use Cases: System programming, game development, and performance-critical applications.
  • Legacy: Essential for understanding low-level computing.

To know more about How you can introduce coding to your kids

Conclusion

Writing code is an essential skill as it opens so many doors in today’s society filled with technology.

Whether you are creating websites, creating applications or merely working on any kind of numeracy, online coding courses prove to be an optimal method for practicing in this field.

Select a proper platform, start practicing, and welcome to the world of coding and programming.

21k school Team

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21K School Team is a group of highly talented and like-minded professionals focused on the creation of informative and engaging content for the audience. Coming from diverse writing backgrounds, the team comes up with unique ideas for sharing information with the 21K School audience. When not writing, you can find the 21K School Team members working closely with interdisciplinary teams for impactful content marketing.

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