Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

const regex = /^\"\w+\"\,(?:\")?(?<process>([\w|\s|\,|\.|\-|\+]+)?)(?:\")?\,\"(?<handles>\d+)\"\,\"(?<VM>[\-\d|\d]+)\"\,\"(?<WS>\d+)\"\,\"(?<PM>\d+)\"\,\"(?<NPM>\d+)\"\,(?:\")?(?<Path>([a-zA-Z]\:\\[\\\w\s\.\-\(\)\+|*\w]+)?)(?:\")?\,(?:\")?(?<Company>([\w|\s|\,|\.|\@]+)?)(?:\")?\,(?:\")?(?<CPU>[\d|\.]+)?(?:\")?\,(?:\")?(?<FileVersion>[\d|\.|\s|\(|\w|\_|\-|\)]+)?(?:\")?\,(?:\")?(?<ProductVersion>[\d|\.|\s|\(|\w|\_|\-|\)]+)?(?:\")?\,(?:\")?(?<Description>[\d|\.|\s|\(|\w|\_|\-|\|\+|\:)]+)?(?:\")?\,(?:\")?(?<Product>[\w|\s|\®|\+|\(|\)]+)?(?:\")?\,(?:\")?(?<Id>[\w|\s|\®|\+|\(|\)]+)?(?:\")?\,(?:\")?(?<PriorityClass>[\w|\s|\®|\+|\(|\)]+)?(?:\")?\,(?:\")?(?<HandleCount>[\w|\s|\®|\+|\(|\)]+)?(?:\")?\,/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('^\\"\\w+\\"\\,(?:\\")?(?<process>([\\w|\\s|\\,|\\.|\\-|\\+]+)?)(?:\\")?\\,\\"(?<handles>\\d+)\\"\\,\\"(?<VM>[\\-\\d|\\d]+)\\"\\,\\"(?<WS>\\d+)\\"\\,\\"(?<PM>\\d+)\\"\\,\\"(?<NPM>\\d+)\\"\\,(?:\\")?(?<Path>([a-zA-Z]\\:\\\\[\\\\\\w\\s\\.\\-\\(\\)\\+|*\\w]+)?)(?:\\")?\\,(?:\\")?(?<Company>([\\w|\\s|\\,|\\.|\\@]+)?)(?:\\")?\\,(?:\\")?(?<CPU>[\\d|\\.]+)?(?:\\")?\\,(?:\\")?(?<FileVersion>[\\d|\\.|\\s|\\(|\\w|\\_|\\-|\\)]+)?(?:\\")?\\,(?:\\")?(?<ProductVersion>[\\d|\\.|\\s|\\(|\\w|\\_|\\-|\\)]+)?(?:\\")?\\,(?:\\")?(?<Description>[\\d|\\.|\\s|\\(|\\w|\\_|\\-|\\|\\+|\\:)]+)?(?:\\")?\\,(?:\\")?(?<Product>[\\w|\\s|\\®|\\+|\\(|\\)]+)?(?:\\")?\\,(?:\\")?(?<Id>[\\w|\\s|\\®|\\+|\\(|\\)]+)?(?:\\")?\\,(?:\\")?(?<PriorityClass>[\\w|\\s|\\®|\\+|\\(|\\)]+)?(?:\\")?\\,(?:\\")?(?<HandleCount>[\\w|\\s|\\®|\\+|\\(|\\)]+)?(?:\\")?\\,', 'gm') const str = `"Process","ServerManager","509","830853120","149446656","125960192","31992","C:\\Windows\\system32\\ServerManager.exe","Microsoft Corporation","140.25","6.3.9600.17238 (winblue_gdr.140723-2018)","6.3.9600.17238","Server Manager","Microsoft® Windows® Operating System","18324","Normal","509","149446656","125960192","125960192","830853120","00:02:20.2500000","8",,"False",,"2200","Microsoft.Win32.SafeHandles.SafeProcessHandle",".","65976","Server Manager","System.Diagnostics.ProcessModule (ServerManager.exe)","1413120","204800","System.Diagnostics.ProcessModuleCollection","31992","31992","125960192","741880","741880","256077824","256077824","279134208","279134208","885768192","885768192","True","125960192","00:00:27.8125000","ServerManager","255","True","1","System.Diagnostics.ProcessStartInfo","1/26/2020 3:22:29 PM",,"System.Diagnostics.ProcessThreadCollection","00:01:52.4375000","830853120","False",,,,"149446656",,`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions