Regex Crossword
Solve crossword grids where every clue is a regular expression
Regex Crossword turns regular expressions into grid puzzles. Each row and column has a regex clue, and you fill in the letters so that every clue matches its line. Some puzzle sets use hexagonal grids, where clues come from three directions.
Free · Browser · Beginner
About Regex Crossword
A step-by-step tutorial explains the symbols first. After that, puzzle sets move from beginner and intermediate up to experienced levels, plus themed sets and puzzles made by other players. You can also build your own puzzles.
It works in the browser and on mobile. A free account lets the site remember which puzzles you solved and track achievements.
On Breakpoint since 23 Oct 2026.