Regex Tester
Test regular expressions against text with real-time match highlighting.
//g
About Regex Tester
Test and debug regular expressions with real-time match highlighting. Enter your regex pattern and test string to see matches highlighted instantly. Supports all JavaScript regex flags and shows match groups.
Frequently Asked Questions
What regex flavour does this use?
The tool uses JavaScript's built-in RegExp engine, which supports most standard regex syntax including lookaheads, lookbehinds, and named groups.
Can I test regex flags?
Yes, you can toggle global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags.