HTML syntax checking tool?

Giganews Newsgroups
Subject: HTML syntax checking tool?
Posted by:  dubi…
Date: 9 Dec 2005

Hello everyone,

Anybody aware of any tools that can check html syntax?  The problem I'm
facing now is a page does not show very right (e.g. a text line
protruding out of the right page border).  It seems like some tag does
not close or something.

Thanks in advance for any suggestions or ideas.