guess-that-lang
Guess the language of a code block as it appears in your terminal
You run the game in your terminal, and it shows a block of code pulled from a random GitHub repository or gist. The code appears line by line, and you guess its language as fast as you can. Flags let you change the reveal delay, show lines in random order, or switch to a light theme.
Free · No login · Terminal · Intermediate
About guess-that-lang
It trains you to recognize languages by their syntax. The pool covers the top 24 languages from the Stack Overflow 2022 Developer Survey, with Dockerfile in place of VBA. It suits developers who already know a few languages.
It is free and open source under Apache-2.0, written in Rust by Lioness100. You can install a prebuilt binary for Windows, Linux or macOS, or build it with cargo. The author strongly recommends a GitHub token to avoid rate limits.
On Breakpoint since 23 Oct 2026.