
Codewars
Exercism
CodinGame
LeetCode
CodeCombat
HackerRank
Google's Python Class
CheckIO is a web site with a mission: To teach JavaScript and Python coding skills through a game-playing interface. It is designed to teach new skills or improve existing skills through completing challenges.
prism.js
highlight.js
Bright
Inkjet (Syntax Highlighting)
Shiki
starry-night
Re-Highlight
Torchlight is a VS Code-compatible syntax highlighter that requires no JavaScript, supports every language, every VS Code theme, line highlighting, git diffing, and more.

Which is more popular?
Based on our record, CheckIO seems to be more popular. It has been mentioned 46 times since March 2021.
Website, pricing, platforms and company facts side by side.
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
No analysis of Torchlight.dev yet.
Walkthroughs and reviews on video.
Intro Video. How to get maximum from CheckiO
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using CheckIO and Torchlight.dev. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

CheckiO is a platform with coding games created for different levels of programmers, from beginners to advanced levels. Using fun and engaging methods, you can use coding games to solve challenges in TypeScript and...
CheckIO is available in English and Spanish. The platform was designed by a group of engineers and now has a number of customers all over the globe who may use it to improve their programming speed and abilities by...
Checkio is the most whimsical HackerRank alternative on this list. It’s also focused on two languages: Python and TypeScript. On this site you’ll be thrown into a gamer’s paradise that includes robot mollusks and...
We have no reviews of Torchlight.dev yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

Have you heard of CheckIO (https://checkio.org/)? They have a gameified "Mario world" of coding challenges that are smaller and come with more explanation, tests to guide you through edge cases and provide hints. The challenges start... Source: almost 3 years ago
Cyber isn't gonna be a light switch, where you can flip it and be good. Don't be too hard on yourself. Start with some hands on stuff like https://tryhackme.com or checkio.org. You could look at certs like Security+ or CySA+ for some... Source: about 3 years ago
Much better to get your hands dirty than watching the videos. Try: https://checkio.org/. Source: over 3 years ago
Tracking Torchlight.dev since May 2025.
When comparing CheckIO and Torchlight.dev, you can also consider the following products.


Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind.
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Download and solve practice problems in over 30 different languages.
Compare Exercism to CheckIO or Torchlight.dev:

Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server.
Compare highlight.js to CheckIO or Torchlight.dev:

CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
Compare CodinGame to CheckIO or Torchlight.dev:
