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

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(Data\": )\"`) var str = `Event 1 : ========= Input Event : [so much data exists in the same single line ] ,\"Comments\": \"New alert\", "Data": "{\"etype\":\"MalwareFamily\",\"at\":\"2024-06-21T11:34:07.0000000Z\",\"md\":\"2024-06-21T11:34:07.0000000Z\",\"Investigations\":[{\"$id\":\"1\",\"Id\":\"urn:ZappedUrlInvestigation:2cc87ae3\",\"InvestigationStatus\":\"Running\"}],\"InvestigationIds\":[\"urn:ZappedUrlInvestigation:2cc8782d063\"],\"Intent\":\"Probing\",\"ResourceIdentifiers\":[{\"$id\":\"2\",\"AadTenantId\":\"2dfb29-729c918\",\"Type\":\"AAD\"}],\"AzureResourceId\":null,\"WorkspaceId\":null,\"Metadata\":{\"CustomApps\":null,\"GenericInfo\":null},\"Entities\":[{\"$id\":\"3\",\"MailboxPrimaryAddress\":\"abc@gmail.com\",\"Upn\":\"abc@gmail.com\",\"AadId\":\"6eac3b76357\",\"RiskLevel\":\"None\",\"Type\":\"mailbox\",\"Urn\":\"urn:UserEntity:10338af2b6c\",\"Source\":\"TP\",\"FirstSeen\":\"0001-01-01T00:00:00\"}, \"StartTimeUtc\": \"2024-06-21T10:12:37\", \"Status\": \"Investigation Started\"}","EntityType": "MalwareFamily", [so much data exists in the same single line ] Event 2 : ======= [so much data exists in the same single line ] ,\"Comments\": \"New alert\", "Data": "{\"etype\":\"MalwareFamily\",\"at\":\"2024-06-21T11:34:07.0000000Z\",\"md\":\"2024-06-21T11:34:07.0000000Z\",\"Investigations\":[{\"$id\":\"1\",\"Id\":\"urn:ZappedUrlInvestigation:2cc87ae3\",\"InvestigationStatus\":\"Running\"}],\"InvestigationIds\":[\"urn:ZappedUrlInvestigation:2cc8782d063\"],\"Intent\":\"Probing\",\"ResourceIdentifiers\":[{\"$id\":\"2\",\"AadTenantId\":\"2dfb29-729c918\",\"Type\":\"AAD\"}],\"AzureResourceId\":null,\"WorkspaceId\":null,\"Metadata\":{\"CustomApps\":null,\"GenericInfo\":null},\"Entities\":[{\"$id\":\"3\",\"MailboxPrimaryAddress\":\"abc@gmail.com\",\"Upn\":\"abc@gmail.com\",\"AadId\":\"6eac3b76357\",\"RiskLevel\":\"None\",\"Type\":\"mailbox\",\"Urn\":\"urn:UserEntity:10338af2b6c\",\"Source\":\"TP\",\"FirstSeen\":\"0001-01-01T00:00:00\"}, \"StartTimeUtc\": \"2024-06-21T10:12:37\", \"Status\": \"Investigation Started\"}","ids": [9654,"78b3"], [so much data exists in the same single line ] Event 3 : ========== [so much data exists in the same single line ] ,\"Comments\": \"New alert\", "Data": "{\"etype\":\"MalwareFamily\",\"at\":\"2024-06-21T11:34:07.0000000Z\",\"md\":\"2024-06-21T11:34:07.0000000Z\",\"Investigations\":[{\"$id\":\"1\",\"Id\":\"urn:ZappedUrlInvestigation:2cc87ae3\",\"InvestigationStatus\":\"Running\"}],\"InvestigationIds\":[\"urn:ZappedUrlInvestigation:2cc8782d063\"],\"Intent\":\"Probing\",\"ResourceIdentifiers\":[{\"$id\":\"2\",\"AadTenantId\":\"2dfb29-729c918\",\"Type\":\"AAD\"}],\"AzureResourceId\":null,\"WorkspaceId\":null,\"Metadata\":{\"CustomApps\":null,\"GenericInfo\":null},\"Entities\":[{\"$id\":\"3\",\"MailboxPrimaryAddress\":\"abc@gmail.com\",\"Upn\":\"abc@gmail.com\",\"AadId\":\"6eac3b76357\",\"RiskLevel\":\"None\",\"Type\":\"mailbox\",\"Urn\":\"urn:UserEntity:10338af2b6c\",\"Source\":\"TP\",\"FirstSeen\":\"0001-01-01T00:00:00\"}, \"StartTimeUtc\": \"2024-06-21T10:12:37\", \"Status\": \"Investigation Started\"}","Name": "Phishing Categroy", [so much data exists in the same single line ] ====== ` var substitution = "$1[" fmt.Println(re.ReplaceAllString(str, substitution)) }

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 Golang, please visit: https://golang.org/pkg/regexp/