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

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r#"({((\\?\".*?\\?\")*?)})"#).unwrap(); let string = "{\\\"active_ad_id\\\":\\\"789915\\\",\\\"publisher_id\\\":\\\"728\\\",\\\"publisher_data1\\\":\\\"225_192_99_bf56c9012a1d810f2ab52\\\",\\\"placement_id\\\":\\\"212_WDfTkctyUHoYbXDU\\\",\\\"device_os\\\":\\\"android\\\",\\\"device_os_version\\\":\\\"5.1\\\",\\\"ip\\\":\\\"78.26.216.249\\\",\\\"request\\\":\\\"/tracking?offer_id=789915\\\\u0026publisher_id=728\\\\u0026placement_id=212_WDfTkctyUHoYbXDU\\\\u0026publisher_data1=225_192_99_bf56c9012a1d810f2ab52\\\\u0026ios_ifa=\\\\u0026google_aid=\\\",\\\"agent\\\":\\\"Mozilla%2F5.0+%28Linux%3B+Android+5.1%3B+m2+Build%2FLMY47D%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Version%2F4.0+Chrome%2F40.0.2214.124+Mobile+Safari%2F537.36\\\",\\\"host\\\":\\\"tracking.cph-media.com\\\",\\\"country\\\":\\\"ua\\\",\\\"state\\\":\\\"51\\\",\\\"city\\\":\\\"odesa\\\",\\\"network_id\\\":7,\\\"tracking_id\\\":\\\"007C1531432355PyAgF1NWwW9fMhSgNrn9TA\\\",\\\"source_id\\\":471,\\\"clicked_at\\\":\\\"2018-07-12 21:52:35.989354\\\",\\\"created_at\\\":\\\"2018-07-12 21:52:36.002024\\\",\\\"updated_at\\\":\\\"2018-07-12 21:52:36.002054\\\",\\\"unix_clicked_at\\\":1531432355,\\\"unix_clicked_at_date\\\":1531353600,\\\"unix_clicked_at_hour\\\":1531429200,\\\"unix_clicked_at_minute\\\":1531432320,\\\"ip_gdpr\\\":\\\"78.26.216.248\\\"}{\\\"active_ad_id\\\":\\\"1350798\\\",\\\"publisher_id\\\":\\\"804\\\",\\\"publisher_data1\\\":\\\"18071223_08_292289_a5d2f506c041e\\\",\\\"placement_id\\\":\\\"a292289s92520128_7086\\\",\\\"device_os\\\":\\\"android\\\",\\\"device_os_version\\\":\\\"6.0\\\",\\\"ip\\\":\\\"182.232.100.114\\\",\\\"request\\\":\\\"/tracking?offer_id=1350798\\\\u0026publisher_id=804\\\\u0026placement_id=a292289s92520128_7086\\\\u0026publisher_data1=18071223_08_292289_a5d2f506c041e\\\\u0026affe=fl\\\",\\\"agent\\\":\\\"Mozilla%2F5.0+%28Linux%3B+Android+6.0%3B+BLL-L22+Build%2FHUAWEIBLL-L22%3B+wv%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Version%2F4.0+Chrome%2F66.0.3359.158+Mobile+Safari%2F537.36\\\",\\\"host\\\":\\\"tracking.stroeermp.com\\\",\\\"country\\\":\\\"th\\\",\\\"state\\\":\\\"10\\\",\\\"city\\\":\\\"bangkok\\\",\\\"network_id\\\":6,\\\"tracking_id\\\":\\\"006C1531432356dR4xiu2gcRDY4V7NfRVJhg\\\",\\\"source_id\\\":623,\\\"clicked_at\\\":\\\"2018-07-12 21:52:36.002165\\\",\\\"created_at\\\":\\\"2018-07-12 21:52:36.010711\\\",\\\"updated_at\\\":\\\"2018-07-12 21:52:36.014774\\\",\\\"unix_clicked_at\\\":1531432356,\\\"unix_clicked_at_date\\\":1531353600,\\\"unix_clicked_at_hour\\\":1531429200,\\\"unix_clicked_at_minute\\\":1531432320,\\\"ip_gdpr\\\":\\\"182.232.100.112\\\"}"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/