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
Processing...

Test String

Code Generator

Language

Generated Code

const regex = /\bGrand Total\s+(.*)/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('\\bGrand Total\\s+(.*)', 'gm') const str = ` Credit Note InterGlobe Aviation Limited (Original For Recipient) Jorhat Airport Airport Road Raraiyah Jorhat Assam 785006 GSTIN : 18AABCI2726B1Z1 Number : AS2181901AB01561 Date : 23-Jan-2019 Passenger Name : PNR : KFRFUZ Flight No : 6E - 5988 From : JRH To : CCU Place of Supply : Haryana GSTIN of Customer : 06AAACM0829Q1Z8 GSTIN Customer Name : MARUTI SUZUKI INDIA LIMITED Currency : INR NonTaxable IGST CGST SGST/UGST Taxable Total(Incl Description SAC Code /Exempted Total Value Tax % Amount Tax % Amount Tax % Amount Taxes) Value Airport Charges 0.00 3,837.00 3,837.00 0.00 0.00 0.00 0.00 0.00 0.00 3,837.00 Grand Total 0.00 3,837.00 3,837.00 0.00 0.00 0.00 3,837.00 Original Invoice Number: AS1181901AI71392 Date: 15-Jan-2019 1. Air Travel and related Charges :- Includes all Charges related to air transportation of passengers 2. Airport Charges :- Includes ADF,UDF,PSF and other airport charges collected on behalf of Airport Operator,as applicable 3. Misc. Services :- Includes Charges of Lounge,Medical Assistance and Travel Certificate 4. Meal :- Includes all prepaid meals purchased before travel 5. Good Karma :- Includes contributions made towards IndiGo's Good Karma initiative and Clear the Air initiative made at the time of reservation 6. Amounts have been rounded off. InterGlobe Aviation Limited Registered Office: Central Wing, Ground Floor, Thapar House, 124 Janpath, New Delhi -110001,India. F 011-43513200. Email: corporate@goindigo.in Corporate Office: Level 1, Tower C, Global Business park, MG Road, Gurgaon-122002, Haryana,India. T +91 124 435 2500. F +91 124 406 8536 goindigo.in CIN no. L62100DL2004PLC129768 , PAN no. AABCI2726B`; // 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