- Making HTML easier to read. So many sites have HTML that is impossible to read. This will show it in a nicely tabbed fashion, so if you are using the wrong tag, parameter, etc, you can find it much more easily.
- Finding bugs in HTML. Every browser is different. Opera throws a wobbler when form tags aren't closed in the right order, and Firefox can either fix it for you or just close the tag as soon as it is open ... great for sending data. This will show you where errors are in your code, so you can find them without hours of commenting out divs until you find the problem. Just as a warning, there are bugs in it, particularly with p tags, and their ability to be work without being closed.
Just enter the HTML in the box below, and click "Parse".