Regex Hunter
Write the shortest regex that catches the targets and spares the rest
Regex Hunter gives everyone the same new puzzle each day. You see words to catch and words to spare, and you write one regular expression that matches all of the first group and none of the second. Your score is the pattern's length, so once it works, you try to make it shorter.
Made by the person who runs Breakpoint.
No login · Browser · Intermediate
About Regex Hunter
The puzzles train character classes, anchors, alternation and lookarounds. Practice packs drill one technique each, and an Academy with nine lesson tracks teaches regex from the start, so both beginners and experienced users have something to do.
It runs in the browser and you can play as a guest. A free account saves your streak and adds you to the rankings. Extra modes include live races against friends, an archive of past days and hunts made by other players.
On Breakpoint since 23 Oct 2026.