Preview:
<!DOCTYPE html>
<html>
<body>
​
<div id="myDiv">
&lt;!DOCTYPE html&gt;<br>
&lt;html&gt;<br>
&lt;body&gt;<br>
<br>
&lt;h1&gt;Testing an HTML Syntax Highlighter&lt;/h2&gt;<br>
&lt;p&gt;Hello world!&lt;/p&gt;<br>
&lt;a href="https://www.w3schools.com"&gt;Back to School&lt;/a&gt;<br>
<br>
&lt;/body&gt;<br>
&lt;/html&gt;
</div>
​
<script>
w3CodeColor(document.getElementById("myDiv"));
​
function w3CodeColor(elmnt, mode) {
  var lang = (mode || "html");
  var elmntObj = (document.getElementById(elmnt) || elmnt);
  var elmntTxt = elmntObj.innerHTML;
  var tagcolor = "mediumblue";
  var tagnamecolor = "brown";
  var attributecolor = "red";
  var attributevaluecolor = "mediumblue";
  var commentcolor = "green";
  var cssselectorcolor = "brown";
  var csspropertycolor = "red";
  var csspropertyvaluecolor = "mediumblue";
  var cssdelimitercolor = "black";
  var cssimportantcolor = "red";  
  var jscolor = "black";
  var jskeywordcolor = "mediumblue";
  var jsstringcolor = "brown";
  var jsnumbercolor = "red";
  var jspropertycolor = "black";
  elmntObj.style.fontFamily = "Consolas,'Courier New', monospace";
  if (!lang) {lang = "html"; }
  if (lang == "html") {elmntTxt = htmlMode(elmntTxt);}
  if (lang == "css") {elmntTxt = cssMode(elmntTxt);}
downloadDownload PNG downloadDownload JPEG downloadDownload SVG

Tip: You can change the style, width & colours of the snippet with the inspect tool before clicking Download!

Click to optimize width for Twitter