Which regex flavor does this use?

It uses the JavaScript RegExp engine, so behavior matches what you would get in browser or Node.js code.

Does it show capture groups?

Yes. Each match lists its numbered capture groups so you can verify what the pattern pulls out.

Can I use flags like global and case-insensitive?

Yes. You can supply standard flags such as g, i, and m alongside the pattern.

Regex Tester (Live)

Test regular expressions against any text with live match highlighting and capture groups. JavaScript RegExp flavor. 100% in your browser.

2 matches

Test textResult (matches highlighted)

Contact: [email protected] or [email protected] for info.

Matches

#1 @9-26: [email protected]
#2 @30-42: [email protected]

About Regex Tester (Live)

The Regex Tester lets you check a regular expression against sample text with live feedback. Type your pattern and any flags, paste the text you want to search, and matches are highlighted as you type. Capture groups are listed separately so you can confirm what each part of the pattern extracts.

Matching happens in your browser using the JavaScript RegExp engine, so your patterns and test text never leave your device. This makes it quick to refine an expression for validation, search-and-replace, or log parsing before moving it into your code.

Frequently asked questions

Which regex flavor does this use?: It uses the JavaScript RegExp engine, so behavior matches what you would get in browser or Node.js code.
Does it show capture groups?: Yes. Each match lists its numbered capture groups so you can verify what the pattern pulls out.
Can I use flags like global and case-insensitive?: Yes. You can supply standard flags such as g, i, and m alongside the pattern.