Codebattle
Race another player to solve the same coding task, live in the browser
Codebattle is a game where you and an opponent solve the same small algorithm task at the same time, and the first passing solution wins. You can watch your opponent's code as they type. You can also practise alone against a bot or join large scheduled tournaments.
Free · No login · Browser · Beginner
About Codebattle
It trains writing correct code quickly in your chosen language. It suits beginners and intermediate programmers, and short tasks keep each game to a few minutes.
It runs in the browser and supports 16 languages, including Python, JavaScript, Go, Rust, Ruby, Elixir and Clojure. The interface is in English, Russian, Spanish and Chinese. It is free and open source.
On Breakpoint since 25 Oct 2026.
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