Regex Tester Online
Test regular expressions against text with real-time match highlighting. Supports all JavaScript regex flags.
Contact us at hello@codeutilo.com or support@example.com for help.
Invalid: @broken, test@, @.com
Invalid: @broken, test@, @.com
Match Details
1."hello@codeutilo.com"at index 14
2."support@example.com"at index 37
What is Regex?
A regular expression (regex) is a sequence of characters that defines a search pattern. It is used for string matching, validation, search-and-replace, and text parsing in virtually every programming language.
Common Regex Flags
g (global) finds all matches. i (case insensitive) ignores case. m (multiline) treats ^ and $ as line boundaries. s (dotall) makes . match newlines.