Test regular expressions against your text. Supports flags: g (global), i (case-insensitive), m (multiline), s (dotall).
No matches
Enter your regular expression pattern in the regex input field (without delimiters).
Type or paste the test text you want to search in the text input area.
Select flags like g (global), i (case-insensitive), or m (multiline) as needed.
View highlighted matches in the text and match details in the results panel below.
All processing is client-side. Your data never touches any server.
No page reloads or server round-trips. Results appear as you type or paste.
No registration, no usage caps, no premium tiers. Use as much as you need.
Fully responsive. Works on desktop browsers, tablets, and mobile phones.
The tester uses JavaScript's built-in RegExp engine, which supports most common regex features including character classes, quantifiers, groups, lookaheads, and backreferences.
Yes. The results panel shows each match's starting position, length, and the matched text. Matches are also visually highlighted in the test string for quick identification.
Yes. All regex testing is performed entirely in your browser. Your patterns and test data are never sent to any server or stored anywhere.