When you copy & paste adsense code directly to your blogger template it shows parsing error. So you need to parse your code so that you can copy & paste your code and use it on your blogger template. HTML Parser is used to parse google adsense or any other ads code so Google Adsense can be added into the body of Blogger Templates. Its very easy to use, just copy & paste your adsense code and click on parse ads button and copy & paste the result to your blogger template.
If you want to use this tool in your website copy & paste following code
<iframe src="http://sharp-coders.com/tools/ads_parser/index.html" width="630" height="400"></iframe>