An RSS feed validator is used to test an RSS document (also called an RSS feed)
to check your code for errors. If the validator finds any problems with your
feed, it will highlight where the problem occurs to help you fix it. To use a
feed validator you must upload your RSS feed to a Web server, then enter the URL
into the feed validator. Two of the more popular online feed validators are
FEED Validator and
RSS Validator.
See also "How to
Create an RSS Feed" in the
Quick Reference section of Webopedia.