regex101: build, test, and debug regex regex, regex tester, regular expression, debugger, pcre, php, golang, java, javascript, python, .net, c#, rust

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Please wait while the app is loading...Whats new?Loading content...CloseSave Regexctrl+sSave Regular ExpressionYour regex has been saved and may be accessed with this link by anybody you give it to. CloseSubmit Workspace to Regex Library0/150WritePreviewHeadersH1H2H30/50000/150SubmitCancelPCRE2 (PHP >=7.3)PCRE (PHP <7.3)ECMAScript (JavaScript)PythonGolangJava 8.NET (C#)RustFlavor HelpLoading content...CloseMatchSubstitutionListUnit Tests SponsorsAn explanation of your regex will be automatically generated as you type.Detailed match information will be displayed here automatically.No MatchRegex Versions/Delimiters/~@;%#/gmRegex FlagsglobalDont return after first matchmulti line^ and $ match sta