css validation besides jigsaw

Question

any other css validation sites out there besides jigsaw? It's saying content:none; is incorrect but according to the specs it should be fine..

Answer 1

I just tried validating

a:after{content:none}

and it says its valid.

Answer 2

The best online css validator that I have found is http://www.w3schools.com/site/site_validate.asp

There are also good browser plug-ins that you can use to validate your css. I recently wrote a blog post with details and links to both online and browser validators - you can go to my blog and read the post ("Validating Your Web Pages for SEO and Useability - Why You Should Do It and How") if you want more information.

Let me know if you have questions!

Answer 3

It's not validation per se (Firefox doesn't implement all of CSS 2.1), but Firebug's console tab can show CSS errors. Very handy for developing.