Regex Builder

Build and test regular expressions visually. AI explains patterns in plain English and suggests fixes.

Regular Expression

//gi

Test String

Match Preview

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Invalid: @no-domain, missing@

2 Matches

[email protected]index 14

[email protected]index 35

Quick Reference

. Any character\\d Digit [0-9]\\w Word char [a-zA-Z0-9_]\\s Whitespace^ Start of string$ End of string* 0 or more+ 1 or more? 0 or 1{n} Exactly n[abc] Character class(abc) Capture groupa|b Alternation\\b Word boundary