Write a regular expression and test it against any sample text with live, highlighted matches. Supports all standard JavaScript regex flags (global, case-insensitive, multiline and more) and shows a running count of how many matches were found.
As you type, matches are highlighted directly in your test string so you can refine the pattern in real time — perfect for validating email formats, extracting data, or debugging a tricky expression before dropping it into your code.
Which regex flavor does this use?
JavaScript (ECMAScript) regular expressions, including flags such as g, i, m, s, and u.
How do I see all matches?
Include the g (global) flag. Matches are highlighted live in your test string with a running count.
Is my test text private?
Yes. Everything runs in your browser and nothing is transmitted.
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