Are there any standalone HTML markup validation tools [closed]

Answer 1

I use the FireFox plugin "HTMLTidy" to do this. When you are testing, you can point Firefox to your dev server (i.e. "http://localhost:52457/...") and it will work as if the site were live.

Also consider setting HTML errors to be raised as compile errors in VS and set your compatibility level/Doctype to XHTML 1.1 Strict to get them all. These settings are under Tools -> Options -> Text Editor -> HTML -> Validation

Answer 2

you could try with tidy

Answer 3

The W3C Markup Validator is an open source tool, which you can download and use it offline.

On Fedora, do:

yum install w3c-markup-validator

Answer 4

CSE HTML Validator is one I have used in the past.

It is not open source, but there is a free version.