A website that works well for this is http://www.sqlinform.com. Paste in your SQL and it formats it nicely.I've been using this for over a year, and it works quite well. Primarily I use it for generated SQL from report builders or from web pages.
Of course, there's always the risk of exposing your SQL statements to an outside source. I wouldn't suggest using this for anything that contains passwords or other sensitive data....
Scott Thornburg