Regex Tester Tool
About Regex Tester
Real-time regex testing (supports g / i / m). Input expression and text to see highlighted matches and counts.
No Match
How to test Regex?
- 1Enter your regular expression in the top input box (without surrounding slashes).
- 2Select flags like g (global) or i (case-insensitive) on the right.
- 3Type your test string into the textarea.
- 4Matching results will be highlighted in real-time below.
Regex FAQ
What regex engine is used?
This tool uses the native JavaScript RegExp engine, which is standard in all modern browsers.
What do the g, i, m flags do?
g enables global search; i makes the matching case-insensitive; m allows ^ and $ to match start/end of lines.