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

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(^\""|\{)"; string input = @"""@odata.context"": ""https://example-app-env.aa01.aaa.aaaa-ad/odata/$metadata#Jobs"", ""@odata.count"": 111, ""value"": [ { ""Key"": ""aaa1a111-aa11-11aa-a11a-11a1aa11a111"", ""StartTime"": ""2023-01-20T14:08:34.607Z"", ""EndTime"": ""2023-01-20T14:08:49.517Z"", ""State"": ""Successful"", ""JobPriority"": ""Normal"", ""Source"": ""Agent"", ""SourceType"": ""Agent"", ""BatchExecutionKey"": ""aaa1a111-aa11-11aa-a11a-11a1aa11a111"", ""Info"": ""Job completed"", ""CreationTime"": ""2023-01-20T14:08:34.607Z"", ""StartingScheduleId"": null, ""ReleaseName"": ""RobotProdLogin_DEV"", ""Type"": ""Attended"", ""InputArguments"": "", ""OutputArguments"": ""{}"", ""HostMachineName"": ""AAAAAAAA11111"", ""HasMediaRecorded"": false, ""PersistenceId"": null, ""ResumeVersion"": null, ""StopStrategy"": null, ""RuntimeType"": ""Development"", ""RequiresUserInteraction"": true, ""ReleaseVersionId"": 1111, ""EntryPointPath"": null, ""OrganizationUnitId"": 1, ""OrganizationUnitFullyQualifiedName"": ""Default"", ""Reference"": "", ""ProcessType"": ""Process"", ""ProfilingOptions"": null, ""ResumeOnSameContext"": false, ""LocalSystemAccount"": ""AAAAAA01\\AAA11AA"", ""OrchestratorUserIdentity"": null, ""Id"": 00000 }, { ""Key"": ""aaa1a111-aa11-11aa-a11a-11a1aa11a111"", ""StartTime"": ""2023-01-20T14:08:34.607Z"", ""EndTime"": ""2023-01-20T14:08:49.517Z"", ""State"": ""Successful"", ""JobPriority"": ""Normal"", ""Source"": ""Agent"", ""SourceType"": ""Agent"", ""BatchExecutionKey"": ""aaa1a111-aa11-11aa-a11a-11a1aa11a111"", ""Info"": ""Job completed"", ""CreationTime"": ""2023-01-20T14:08:34.607Z"", ""StartingScheduleId"": null, ""ReleaseName"": ""RobotProdLogin_DEV"", ""Type"": ""Attended"", ""InputArguments"": "", ""OutputArguments"": ""{}"", ""HostMachineName"": ""AAAAAAAA11111"", ""HasMediaRecorded"": false, ""PersistenceId"": null, ""ResumeVersion"": null, ""StopStrategy"": null, ""RuntimeType"": ""Development"", ""RequiresUserInteraction"": true, ""ReleaseVersionId"": 1111, ""EntryPointPath"": null, ""OrganizationUnitId"": 1, ""OrganizationUnitFullyQualifiedName"": ""Default"", ""Reference"": "", ""ProcessType"": ""Process"", ""ProfilingOptions"": null, ""ResumeOnSameContext"": false, ""LocalSystemAccount"": ""AAAAAA01\\AAA11AA"", ""OrchestratorUserIdentity"": null, ""Id"": 00000 },"; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx