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

const regex = /(\d{1,2}\S\d{3})/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('(\\d{1,2}\\S\\d{3})', 'gm') const str = `&lt;table style=&quot;width: 440px; margin: 10px auto; background-color: #CCC; text-align: center; border-spacing: 1px;&quot;&gt;&lt;tbody&gt;&lt;tr style=&quot;background-color: #FFF;&quot;&gt;&lt;td rowspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td colspan=&quot;2&quot; style=&quot;padding: 3px;&quot;&gt;  &lt;/td&gt;&lt;td colspan=&quot;2&quot; style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=&quot;background-color: #FFF;&quot;&gt;&lt;td style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;td style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;td style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;Час&lt;/td&gt;&lt;td style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=&quot;background-color: #FFF;&quot;&gt;&lt;td style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;8 000 р.&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;16 000 р.&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;b&gt;10 000 р.&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;b&gt;60 000 р.&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=&quot;background-color: #FFF;&quot;&gt;&lt;td rowspan=&quot;2&quot; style=&quot;padding: 3px;&quot;&gt;*&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;-&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;25 000 р.&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;b&gt;25 000 р.&lt;/b&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px; background-color: #E8E8E8;&quot;&gt;&lt;b&gt;70 000 р.&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=&quot;background-color: #FFF;&quot;&gt;&lt;td colspan=&quot;4&quot; style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr class=&quot;noprint&quot; style=&quot;background-color: #FFF;&quot;&gt;&lt;td colspan=&quot;3&quot; rowspan=&quot;2&quot; style=&quot;text-align: left;&quot;&gt;&lt;div style=&quot;margin: 5px 7px;&quot;&gt;&lt;/div&gt;&lt;div style=&quot;margin: 5px 7px;&quot;&gt;&lt;a href=&quot;#&quot; onclick=&quot;return helpContacts();&quot;&gt;&lt;img src=&quot;I/question.gif&quot; border=&quot;0&quot; width=&quot;11&quot; height=&quot;11&quot; alt=&quot;&quot; style=&quot;vertical-align: text-bottom;&quot; onmouseover=&quot;this.src=&#039;I/question.png&#039;;&quot; onmouseout=&quot;this.src=&#039;I/question.gif&#039;;&quot; /&gt;&lt;/a&gt;&lt;/div&gt;&lt;/td&gt;&lt;td style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;-&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr class=&quot;noprint&quot; style=&quot;background-color: #FFF;&quot;&gt;&lt;td style=&quot;padding: 3px;&quot;&gt;&lt;/td&gt;&lt;td class=&quot;ver12 nowrap&quot; style=&quot;padding: 3px;&quot;&gt;&lt;b&gt;-&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr class=&quot;noprint&quot; style=&quot;background-color: #FFF;&quot;&gt;&lt;td colspan=&quot;5&quot; class=&quot;ar13&quot; style=&quot;padding: 5px 7px; text-align: left;&quot;&gt;&lt;i&gt;&lt;/i&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;`; // 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