Regex Crossword

What Regex Crossword actually is

Each grid gives you a pattern for every row and every column, and the only letters that fit are the ones satisfying both at once. Puzzles start at two-by-two with literal matches and build through character classes, backreferences and lookaheads across several dozen levels.

Why it is worth your time

It teaches regex the way a crossword teaches vocabulary: by making you want the answer badly enough to work out the syntax yourself.

Common questions

Is Regex Crossword free?

Yes. Regex Crossword is free and does not ask you to register or hand over an email address before you can use it.

How long does Regex Crossword take?

Five to fifteen minutes of proper attention. We file it under "Coffee break" — crosswords where every clue is a regular expression.

Does Regex Crossword work on a phone?

Regex Crossword really wants a mouse and a wide window. It will load on a phone, but the experience is built for desktop.

What kind of site is Regex Crossword?

We list it under Mind Benders — one more round, then bed. definitely. It teaches regex the way a crossword teaches vocabulary: by making you want the answer badly enough to work out the syntax yourself.