Leetle
Solve one short coding problem a day in Python or JavaScript
Leetle gives everyone the same small coding problem each day. You read a LeetCode-style prompt with constraints and an example, write a function in the browser editor, and run it against test cases. Your attempts are tracked, and you get a shareable result grid in the style of Wordle.
Free · Browser · New puzzle daily · Intermediate
About Leetle
The puzzles train everyday algorithm work: graphs, arrays, strings and counting problems. It suits people who want a short daily habit rather than a long practice session, from confident beginners upward.
It runs in the browser with Python and JavaScript, and the editor has optional Vim controls. Past puzzles are kept in an archive. It appears to be free; whether an account is needed for streaks was not confirmed.
On Breakpoint since 25 Oct 2026.
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