Regex Crossword
Fill the grid so every row and column matches its regex pattern.
Regex Crossword is a logic puzzle where each cell holds a single character. Row patterns are shown to the left; column patterns are shown above. Type a character in a cell — use arrow keys or Tab to navigate between cells. Cells turn green when they are consistent with their row and column patterns. Fill every cell correctly to solve the puzzle. Use Hint to reveal a random empty cell.
About This Tool
- Select a puzzle from the difficulty levels
- Type one character per cell to fill the grid
- Each row must match its regex pattern (shown on the left)
- Each column must match its regex pattern (shown above)
- Green cells are correct, red cells need adjustment — fill the whole grid to win
- Learning regular expressions through interactive puzzles
- Practicing regex pattern matching in a fun way
- Teaching regex concepts to students or team members
- Sharpening pattern recognition skills
- Start with Level 1 puzzles to learn the basics
- Check one row or column at a time to narrow down possibilities
- Use the Hint button if you are stuck on a tricky cell
- The timer tracks your speed — try to beat your best times
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