Explanation.
If you want to type any html code into your blogger post. and you want to make it appear as you typed it, i mean like the following,
<html>
<body>
<p><strong>AllBlogTools.com</strong></p>
<p>The biggest source for blogger templates, tools, tutorials, and tricks. </p>
</body>
</html>
you can't just simply type it in normal symbols because your browser will automatically interpret the symbols .
So you have to change/Encode some symbols to another symbols.
To know more about this tool please visit allblogtools.com html code generator