Free interactive regex exercises with real-time feedback
See matches highlighted instantly as you type your regex. No need to submit — results update live with green and red indicators showing expected versus actual matches.
20 puzzles from beginner to advanced. Start with literal characters and character classes, progress through anchors, groups, lookaheads, and backreferences.
Stuck on a puzzle? Get progressive hints — see a partial regex pattern, reveal the first character, or view the complete solution to keep learning.
Your completed puzzles, score, and streak are saved locally. Pick up right where you left off. Compete with yourself to maintain daily streaks.
Also try: regex101 · Regex Crossword · RegExr