Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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 = /(?<=\D{3}.\d{2}.\d{4}).*(?<=\D)/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('(?<=\\D{3}.\\d{2}.\\d{4}).*(?<=\\D)', 'gm') const str = `Ｉ Ｎ Ｖ Ｏ Ｉ Ｃ Ｅ **** JUL.19,2022 Ｄ Ａ Ｔ Ｅ ： 1-21, SHIBAURA 3-CHOME,MINATO-KU,TOKYO, JAPAN NN390 ＩＮＶＯＩＣＥ　ＮＯ． MITSUBISHI MOTORS AUSTRALIA LIMITED. 1 SIR RICHARD WILLIAMS AVENUE, ADELAIDE AIRPORT SA 5950 AUSTRALIA ＮＡＭＥ　ＯＦ　ＶＥＳＳＥＬ ＯＮ　ＯＲ　ＡＢＯＵＴ ＬＯＡＤＩＮＧ　ＰＯＲＴ OOCL NEW ZEALAND 115S JUL.30,2022 NAGOYA,JAPAN ＤＩＳＣＨＡＲＧＩＮＧ　ＰＯＲＴ ＩＮＳＵＲＡＮＣＥ FREMANTLE,AUSTRALIA COVERED BY SHIPPER ＰＡＹＭＥＮＴ　ＴＥＲＭＳ REMITTANCE AT 45 DAYS AFTER B/L DATE ＭＡＲＫ　＆　ＮＯＳ ＤＥＳＣＲＩＰＴＩＯＮ ＱＵＡＮＴＩＴＹ ＵＮＩＴ　ＰＲＩＣＥ ＡＭＯＵＮＴ -AS PER SPARE PARTS FOR ATTACHED SHEET- MITSUBISHI VEHICLES PCS AUS.DOLLARS *** *********** FOB NET 2,553 75,622.32* PACKING CHARGE 529.36* FOB NAGOYA JAPAN 76,151.68* INSURANCE 380.76* C&I FREMANTLE 76,532.44* ********** "WE DECLARE THAT THE MACHINERY AND/OR PARTS AND ACCESSORIES ARE NEW AND UNUSED AND HAVE NOT BEEN FIELD TESTED OR FACTORY TRIALLED" PACKING LIST LOT NO C/S NO GROSS WT NET WT M/M MASAYUKI SHIBUYA GENERAL MANAGER GLOBAL AFTER SALES LOGISTICS DEPARTMENT GLOBAL AFTER SALES DIVISION MITSUBISHI MOTORS CORPORATION ＡＶ ０ `; // 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