CodinGame combines coding games, puzzles, and programming challenges, with support for more than 25 languages.
Free
24 alternativesChecki0
CheckiO provides coding games where learners practice Python and TypeScript programming.
About Checki0
CheckiO is a website of coding games where learners practice Python and TypeScript by solving programming challenges. The homepage describes the challenges as suitable for both beginners and advanced programmers. The site runs separate game areas for each language, py.checkio.org for Python and js.checkio.org for TypeScript. It also offers Empire of Code, a space game that combines strategy, tactics and coding. Teachers use CheckiO as a supplementary tool in courses, and the ClassRooms feature lets teachers and students see each other's progress. According to the homepage, the site has about 50k monthly active Python and TypeScript players and is used in more than 100 schools and universities. Free accounts have some restrictions, and the homepage says schools and universities can ask for an exception for their class. Pricing details are not stated.
Key features
- Python and TypeScript coding challenges for beginner and advanced programmers
- Separate game sites for Python and TypeScript practice
- Empire of Code, a space game mixing strategy, tactics and coding
- ClassRooms for teachers and students to view progress
- Access to analyse other members' solutions within missions
Best for: Beginner and advanced learners practicing Python or TypeScript, and teachers who want game-based coding practice for their classes.
Good for
- Teachers use it as an extra tool during courses, according to the homepage
- The homepage states use in more than 100 schools and universities
- Offers both Python and TypeScript practice in one place
Watch out for
- Free accounts have some restrictions, which the homepage does not list
- Pricing details are not stated on the homepage
Checki0 at a glance
- Website
- checkio.org
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Good for
- Developers, Educators
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Checki0 FAQ
Can schools or universities get access beyond the free account restrictions?
The homepage says schools and universities can contact CheckiO to request an exception for their class.
Which programming languages does CheckiO cover?
The homepage says the coding games cover Python and TypeScript.
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