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

const regex = /<td align=\"left\">\s*(<a href=\"http:\/\/www.proxynova.com\/proxy-server-list\/port-\d+|\d+).*?\s*<\/td>/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('<td align=\\"left\\">\\s*(<a href=\\"http:\\\/\\\/www.proxynova.com\\\/proxy-server-list\\\/port-\\d+|\\d+).*?\\s*<\\\/td>', 'g') const str = `<table width="950" class="table" id="tbl_proxy_list"> <thead> <tr> <th>Proxy IP</th> <th>Proxy Port</th> <th>Last Check</th> <th nowrap="nowrap"><span title="Proxy Speed in bytes per second">Proxy Speed</span></th> <th>Uptime</th> <th><span title="The location of that particular proxy.">Proxy Country</span></th> <th>Anonymity </th> </tr> </thead> <tbody> <tr> <td align="left"> <span class="row_proxy_ip">220.225.87.129</span> </td> <td align="left"> <a href="http://www.proxynova.com/proxy-server-list/port-8080">8080</a> </td> <td align="left"> <time class="icon icon-check timeago" datetime="2016-03-14 12:58:53Z"></time> </td> <td align="left"> <div class="progress-bar" data-value="7.7100404" title="5855.0202"></div> </td> <td style="text-align:center !important;"> <span style="color:#009900;">59%</span> </td> <td align="left"> <img src="//www.proxynova.com/assets/images/blank.gif" class="flag flag-in" width="15" height="11" alt="IN" /> <a href="/proxy-server-list/country-in/">India <span class="proxy-city"> - Chandannagar </span> </a> </td> <td align="left"> <span class="proxy_transparent" style="font-weight:bold; font-size:10px;">Transparent</span> </td> </tr> <tr> <td align="left"> <span class="row_proxy_ip">220.225.87.129</span> </td> <td align="left"> <a href="http://www.proxynova.com/proxy-server-list/port-8080">8080</a> </td> <td align="left"> <time class="icon icon-check timeago" datetime="2016-03-14 12:58:53Z"></time> </td> <td align="left"> <div class="progress-bar" data-value="7.7100404" title="5855.0202"></div> </td> <td style="text-align:center !important;"> <span style="color:#009900;">59%</span> </td> <td align="left"> <img src="//www.proxynova.com/assets/images/blank.gif" class="flag flag-in" width="15" height="11" alt="IN" /> <a href="/proxy-server-list/country-in/">India <span class="proxy-city"> - Chandannagar </span> </a> </td> <td align="left"> <span class="proxy_transparent" style="font-weight:bold; font-size:10px;">Transparent</span> </td> </tr> <tr> <td align="left"> <span class="row_proxy_ip">220.225.87.129</span> </td> <td align="left"> 80 </td> <td align="left"> <time class="icon icon-check timeago" datetime="2016-03-14 12:58:53Z"></time> </td> <td align="left"> <div class="progress-bar" data-value="7.7100404" title="5855.0202"></div> </td> <td style="text-align:center !important;"> <span style="color:#009900;">59%</span> </td> <td align="left"> <img src="//www.proxynova.com/assets/images/blank.gif" class="flag flag-in" width="15" height="11" alt="IN" /> <a href="/proxy-server-list/country-in/">India <span class="proxy-city"> - Chandannagar </span> </a> </td> <td align="left"> <span class="proxy_transparent" style="font-weight:bold; font-size:10px;">Transparent</span> </td> </tr> </tbody> </table>`; // 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