Collection Online Courses 2026.06.28

A Collection of Online Course Platforms for Enhancing Workplace Skills

One Hour After Work, Learning Job Skills Through Courses

When you need new skills for promotions, job changes, or role transitions, you can now learn through online lectures after work. There are many courses that can be applied immediately in practice.

The fields and depths differ from platform to platform, covering IT, design, planning, marketing, and more. Check out the sample lectures to see the instructor's style and level before you choose.

We've gathered popular online lecture platforms that many professionals listen to. Be sure to compare and see if there are courses that fit your job role.

Inflearn

An online learning platform rich in practical courses centered around IT and development. Many courses are created by active developers and experts, allowing you to choose from beginner to advanced levels. It's especially suitable for those looking to learn skills that can be applied directly to their jobs.

Class 101

A class platform where you can learn a wide range of fields through videos, from hobbies to job-related skills. Some courses even provide materials and resources, making it friendly for those entering new areas. It also offers a subscription model that allows you to freely take multiple courses.

Fast Campus

An online education platform specialized in practical training for fields like data, development, design, and marketing. With many long-term courses featuring systematic curriculums, it's great for delving deeply into a single area. It's suitable for professionals who are seriously preparing for career transitions or enhancing their job skills.

Udemy

A global learning platform where you can access a vast array of lectures from instructors around the world at reasonable prices. With a wide range of subjects and frequent discount events, you can try out various fields without financial burden. Once you purchase, you can keep the course lifetime and revisit it whenever needed.

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Coloso

A high-quality video lecture platform that contains the know-how of top experts in various fields. It's strong in advanced learning in design, video, illustration, and creation. Suitable for those who want to learn in-depth skills that can be directly applied in practical situations.

Day One Company

An adult education company that provides training for professionals and office workers. It offers immersive courses such as boot camps and live lectures by job role, allowing for concentrated learning in a short period. It's perfect for those who want to complete courses with colleagues within a scheduled timeline.

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Learning Spoons

A job training service centered around lectures by active professionals. It features many practical topics in data, planning, marketing, and includes live Q&A sessions. Suitable for those who prefer a hands-on learning approach that emphasizes practical application over theory.

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Codeit

An online programming learning service that teaches coding through step-by-step practice. The method of writing code and immediately checking the results allows even non-majors to follow along gradually. It's well-suited for beginners looking to solidify their foundational understanding of development.

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Sparta Coding Club

A learning service known for coding education aimed at non-major professionals. Many choose this service for its supportive operation and practice-focused curriculum, making it ideal for those venturing into coding for the first time. It's a great way to gain confidence by creating tangible results within a short period.

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You can minimize the risk of choosing a course by verifying the instructor's style and level through sample videos. Even if the topic is the same, the depth varies across platforms.

Take the time to compare whether the courses align with your job role and goals. It’s also a good idea to consider if it’s a manageable length that you can complete.

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