Which regex flavor is this?

JavaScript RegExp (ECMAScript), including flags like g, i, m, s, and u when supported.

Regex Tester

Free online regex tester with live matches and replace preview. JavaScript flavor, browser-only.

Processed locally in your browser — nothing is uploaded.

Replace with

Test string

Matches (1)

Replace preview

The quick brown fox jumps over the lazy dog.
Contact us at [email] or visit https://example.com.

Test JavaScript regular expressions with live matches and replace preview. Debug patterns safely in your browser.

Which regex flavor is this?: JavaScript RegExp (ECMAScript), including flags like g, i, m, s, and u when supported.