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 = /\"orderId\":\"(?<orderId>[^\"]+)\"},\"error\":\{\"errorCode\":\"(?<errorCode>[^\"]+)\"/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('\\"orderId\\":\\"(?<orderId>[^\\"]+)\\"},\\"error\\":\\{\\"errorCode\\":\\"(?<errorCode>[^\\"]+)\\"', 'gm') const str = `message: Send jms message [queue=SEP.TO.PEIN, statusCode=200, idempotencyId=b95d0d10-9709-4299-9d3e-8c65dd5a539d, processId=PE2400000582026, delivApp=null, message={"transactionItems":[{"itemId":"4f2170cd-35f6-4d03-b0fe-6ebbca6e00cb","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595009","currencyCode":"INR"}}},{"itemId":"adea3dff-8e02-433e-a2ad-94bac828989b","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595009","currencyCode":"INR"}}},{"itemId":"bf96b534-2150-4228-843f-9fb920a1f44f","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595009","currencyCode":"INR"}}},{"itemId":"cb6e42ac-ee83-48b6-8213-7faf0311c6d0","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595009","currencyCode":"INR"}}},{"itemId":"bdd8a76f-ddb4-4616-a793-68ddd72aad0e","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595009","currencyCode":"INR"}}},{"itemId":"cb339f2a-ad85-410c-9043-275aa1e4fe17","status":"FAILED","accountIdentification":{"contractAccountNumber":{"branchCode":"0784","accountNumber":"0190595011","currencyCode":"INR"}}}],"orderStatusResponse":{"orderStatus":"ORDER_FAILURE","orderId":"b95d0d10-9709-4299-9d3e-8c65dd5a539d"},"error":{"errorCode":"SEP013","errorDescription":"Cannot find IDMS-0784 account by accNumber: 0190595009"}}]`; // 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