Regex Tester – Test Regular Expressions Online
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Need a refresher on regex? Read: Regex Basics & Testing
Read the guideTest and debug regular expressions in real time. Enter a regex pattern and some sample text to see live matches highlighted, inspect capture groups, and toggle flags — a fast online regex tester that helps you build patterns that work the first time.
As you type a pattern, every match in your sample text is highlighted instantly so you can see exactly what it captures. Tweak the expression and watch the results update — no recompiling, no guesswork.
Inspect the capture groups for each match, and toggle flags like global, case-insensitive, multiline, dot-all and unicode to fine-tune behavior. It is the quickest way to test a regex before dropping it into code.
Enter your regex pattern and paste sample text. Matches are highlighted live and capture groups are listed, so you can refine the pattern until it behaves correctly.
Yes. For each match it lists the captured groups so you can confirm your pattern extracts the right parts.
Common JavaScript flags are supported, including global, case-insensitive, multiline, dotall and unicode.