Character Width Generator

<!DOCTYPE html>
<html>
<body>

<canvas id="myCanvas" width="0" height="0" style="border:1px solid #d3d3d3;">
Your browser does not support the HTML5 canvas tag.</canvas>
<pre>
<script>

var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.font = "12pt Arial";
for (character = 32; character < 127; character++)
{
   var txt = ""
   for (i = 0; i < 128; i++)
   {
      txt = txt + String.fromCharCode(character);
   }
   document.writeln(String.fromCharCode(character), ": ", ctx.measureText(txt).width / 128);
}

</script>
</pre>
</body>
</html>