Developer Utility
Regex Tester
Test regular expressions live, highlight matches, and inspect capture groups directly in your browser.
Live regular expression tester
01
Regular expression
Choose a ready-made pattern or enter your own
02
Test text
0 characters
03
0 foundHighlighted preview
Matches are highlighted as you type
Your highlighted matches will appear here.
Match details
Indexes, complete matches, and capture groups
No pattern selected.*No matches yet
Adjust the pattern, flags, or test text to find a match.
Live matching
Results and highlighted text update instantly as you edit.
Capture insights
Inspect full matches, indexes, numbered groups, and named groups.
Private by design
Your pattern and test text never leave your browser.