About JX-Codele

JX-Codele is a daily code-guessing game. Each day brings a new puzzle: a short snippet of real code that we reveal one piece at a time. Your job is to recognize the programming concept behind it before the code is fully uncovered.

The game currently covers eight languages — Python, JavaScript, TypeScript, Java, C++, Go, Rust, and SQL — with puzzles spanning everything from beginner warm-ups to tricky language features and classic algorithms.

We built JX-Codele because we love the small moment of recognition when you look at a few lines of code and just know what they do. It is part quiz, part daily ritual, and a low-pressure way to stay sharp across languages you might not touch every day.

JX-Codele is made and maintained by the JX-Codele team. We add new puzzles regularly and read the feedback that comes in through our social channels. If you have an idea for a puzzle, or you spot something wrong, we would genuinely like to hear from you — see the Contact page.

New here? The How to Play page walks through the rules in under a minute.