Regex tester

JavaScript (ECMAScript) regular expressions, run by your browser’s own RegExp engine. PCRE, Python and .NET differ in places.

Pattern

Flags g global i ignore case m multiline s dotAll u unicode v unicodeSets y sticky d indices

Test text

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Replacement $1 group 1 · $<name> named group · $& whole match · $` text before · $' text after · $$ a $

text.replace(regex, replacement)

Show text.split(regex)