Question 1

What regex flavors does this tester support?

Accepted Answer

This tool uses JavaScript's built-in RegExp engine, which supports ECMAScript regular expressions including lookahead, lookbehind, named groups, and Unicode properties.

Question 2

Can I test regex with multiple flags?

Accepted Answer

Yes, you can use flags like global (g), case-insensitive (i), multiline (m), dotAll (s), and Unicode (u). Toggle them individually to see how they affect matches.

Question 3

Is there a library of common regex patterns?

Accepted Answer

Yes, the tool includes a pattern library with common expressions for emails, URLs, phone numbers, dates, IP addresses, and more. Click any pattern to load it instantly.

Regex Tester

Common Patterns