Source Code Formatter

Source Code Formatter
http://hilite.me/ <<< recommend
http://codeformatter.blogspot.com/
http://formatmysourcecode.blogspot.com/

Html Code Formatter

http://www.freebits.co.uk/convert-html-code-to-text.html

Adding Syntax Highlighter to Blogger Template

http://alexgorbatchev.com/SyntaxHighlighter/

Example : http://www.craftyfella.com/2010/01/syntax-highlighting-with-blogger-engine.html

Use Desktop Application

http://precode.codeplex.com/

Use Google's Prettify
http://nuiorama.blogspot.com/2011/05/syntax-highlighting-google-code.html

And Many ways to Code Formatter

http://www.hanselman.com/blog/HowToPostCodeToYourBlogAndOtherReligiousArguments.aspx