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

/
/

Test String

Code Generator

Language

Generated Code

const regex = /<\d+>\S+\s(\d{4}-\d{2}-\d{2})\s(\d{2}\x3a\d{2}\x3a\d{2}),\d+\s\x5b\d+\x5d\s+\S+\s+\S+\s\S+\s+\S+\s+\S+\s\S+\s\ServerIPAddress\x3a\s\S+\s((?:\d{1,3}\x2e){3}\d{1,3})\s+ClientIPAddress\x3a\s(\S+)\s\S+\s\S+\s\S+\s\S+\s+\S+\s\S+\s+\S+\s\S+\s+\S+\s\S+\s+\S+\s+\S+\s+MessageText\x3a\s(Admin\sActivity)\s+UserId\x3a\s(\d+)\s+UserName\x3a\s(\S+)\s+Action\sDate\/Time\x3a\s+\S+\s\S+\s\S+\s+Portal\sGroup\sId\x3a\s(\d+)\s+Portal Group Name\x3a\s([a-zA-Z\s]+)\s+Action\sType\x3a\s([a-zA-Z\s]+)\sAction\sDetail\x3a([a-zA-Z0-9\.\;\s\:]+)\sArea\sOf\sAdministration\x3a\s(\S+)\s+Portal\sId\x3a\s(\d+)\s+Portal\sName\x3a\s([a-zA-Z0-9\s]+)\s+Enterprise\sUser\x3a\s(\S+)/; // Alternative syntax using RegExp constructor // const regex = new RegExp('<\\d+>\\S+\\s(\\d{4}-\\d{2}-\\d{2})\\s(\\d{2}\\x3a\\d{2}\\x3a\\d{2}),\\d+\\s\\x5b\\d+\\x5d\\s+\\S+\\s+\\S+\\s\\S+\\s+\\S+\\s+\\S+\\s\\S+\\s\\ServerIPAddress\\x3a\\s\\S+\\s((?:\\d{1,3}\\x2e){3}\\d{1,3})\\s+ClientIPAddress\\x3a\\s(\\S+)\\s\\S+\\s\\S+\\s\\S+\\s\\S+\\s+\\S+\\s\\S+\\s+\\S+\\s\\S+\\s+\\S+\\s\\S+\\s+\\S+\\s+\\S+\\s+MessageText\\x3a\\s(Admin\\sActivity)\\s+UserId\\x3a\\s(\\d+)\\s+UserName\\x3a\\s(\\S+)\\s+Action\\sDate\\\/Time\\x3a\\s+\\S+\\s\\S+\\s\\S+\\s+Portal\\sGroup\\sId\\x3a\\s(\\d+)\\s+Portal Group Name\\x3a\\s([a-zA-Z\\s]+)\\s+Action\\sType\\x3a\\s([a-zA-Z\\s]+)\\sAction\\sDetail\\x3a([a-zA-Z0-9\\.\\;\\s\\:]+)\\sArea\\sOf\\sAdministration\\x3a\\s(\\S+)\\s+Portal\\sId\\x3a\\s(\\d+)\\s+Portal\\sName\\x3a\\s([a-zA-Z0-9\\s]+)\\s+Enterprise\\sUser\\x3a\\s(\\S+)', '') const str = `<190>MedSeekBusinessServer.exe: 2016-08-08 09:04:06,965 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider ClassName: AuditTrailSqlDao MethodName: LogToSysLog CustomProps: 6ZalfDCycQw= MessageText: Admin Activity UserId: 301640 UserName: myost6 Action Date/Time: 8/8/2016 1:04:06 PM Portal Group Id: 1273153 Portal Group Name: myCarolinas Admin Action Type: Update User Action Detail: User updated. User ID: 301640; UserName: myost6; Area Of Administration: Users Portal Id: 6 Portal Name: my Carolinas Mobile Enterprise User: False <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:06,965 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider ClassName: AuditTrailSqlDao MethodName: LogToSysLog CustomProps: 6ZalfDCycQw= MessageText: Admin Activity UserId: 301640 UserName: myost6 Action Date/Time: 8/8/2016 1:04:06 PM Portal Group Id: 1273153 Portal Group Name: myCarolinas Admin Action Type: Update User Action Detail: User updated. User ID: 301640; UserName: myost6; Area Of Administration: Users Portal Id: 6 Portal Name: my Carolinas Mobile Enterprise User: False <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:12,815 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider ClassName: AuditTrailSqlDao MethodName: LogToSysLog CustomProps: 6ZalfDCycQw= MessageText: Admin Activity UserId: 244010 UserName: katdbod Action Date/Time: 8/8/2016 1:04:12 PM Portal Group Id: 1273153 Portal Group Name: myCarolinas Admin Action Type: Update User Action Detail: User updated. User ID: 244010; UserName: katdbod; Area Of Administration: Users Portal Id: 2 Portal Name: myCarolinas Enterprise User: False <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:12,815 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider%0D ClassName: AuditTrailSqlDao%0D MethodName: LogToSysLog%0D CustomProps: 6ZalfDCycQw=%0D MessageText: Admin Activity%0D UserId: 244010%0D UserName: katdbod%0D Action Date/Time: 8/8/2016 1:04:12 PM%0D Portal Group Id: 1273153%0D Portal Group Name: myCarolinas Admin%0D Action Type: Update User%0D Action Detail: User updated. User ID: 244010; UserName: katdbod; %0D Area Of Administration: Users%0D Portal Id: 2%0D Portal Name: myCarolinas%0D Enterprise User: False%0D <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:12,971 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider%0D ClassName: AuditTrailSqlDao%0D MethodName: LogToSysLog%0D CustomProps: 6ZalfDCycQw=%0D MessageText: Admin Activity%0D UserId: 244010%0D UserName: katdbod%0D Action Date/Time: 8/8/2016 1:04:12 PM%0D Portal Group Id: 1273153%0D Portal Group Name: myCarolinas Admin%0D Action Type: Update User%0D Action Detail: User updated. User ID: 244010; UserName: katdbod; %0D Area Of Administration: Users%0D Portal Id: 2%0D Portal Name: myCarolinas%0D Enterprise User: False%0D <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:12,971 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider%0D ClassName: AuditTrailSqlDao%0D MethodName: LogToSysLog%0D CustomProps: 6ZalfDCycQw=%0D MessageText: Admin Activity%0D UserId: 244010%0D UserName: katdbod%0D Action Date/Time: 8/8/2016 1:04:12 PM%0D Portal Group Id: 1273153%0D Portal Group Name: myCarolinas Admin%0D Action Type: Update User%0D Action Detail: User updated. User ID: 244010; UserName: katdbod; %0D Area Of Administration: Users%0D Portal Id: 2%0D Portal Name: myCarolinas%0D Enterprise User: False%0D <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:33,766 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider%0D ClassName: AuditTrailSqlDao%0D MethodName: LogToSysLog%0D CustomProps: 6ZalfDCycQw=%0D MessageText: Admin Activity%0D UserId: 164664%0D UserName: rrrleigh%0D Action Date/Time: 8/8/2016 1:04:33 PM%0D Portal Group Id: 1273153%0D Portal Group Name: myCarolinas Admin%0D Action Type: Change User Password%0D Action Detail: Password changed for user. User ID: 164664; %0D Area Of Administration: Users%0D Portal Id: 2%0D Portal Name: myCarolinas%0D Enterprise User: False%0D <190>MedSeekBusinessServer.exe: 2016-08-08 09:04:33,766 [4] INFO MedSeek.Portal.Server.LoggingProvider.Data.AuditTrailSqlDao UserID: -9999 UserName: System ServerIPAddress: 10.247.82.26 10.247.82.112 ClientIPAddress: (null) PortalId: (null) PortalName: (null) AssemblyName: MedSeek.Portal.Server.LoggingProvider%0D ClassName: AuditTrailSqlDao%0D MethodName: LogToSysLog%0D CustomProps: 6ZalfDCycQw=%0D MessageText: Admin Activity%0D UserId: 164664%0D UserName: rrrleigh%0D Action Date/Time: 8/8/2016 1:04:33 PM%0D Portal Group Id: 1273153%0D Portal Group Name: myCarolinas Admin%0D Action Type: Change User Password%0D Action Detail: Password changed for user. User ID: 164664; %0D Area Of Administration: Users%0D Portal Id: 2%0D Portal Name: myCarolinas%0D Enterprise User: False%0D `; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; if ((m = regex.exec(str)) !== null) { // 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