You can use W3C validation services to check HTML documents, CSS stylesheets, Atom/RSS feeds, and more.
The new schema.org by Google, Yahoo and MS recommends usage of the <link> attribute to display the …
html w3c-validationI use the webkit/mozilla border radius and box shadow CSS properties, but I want the CSS to validate (which …
css w3c-validation vendor-prefixIt may be a nonsense question, and I know we have to follow standards as much as possible. But can &…
html html-table w3c w3c-validationAccording to the W3C validator, I am getting this error: The language attribute on the script element is obsolete. …
html w3c-validation script-elementI work on a large scale, high volume, public facing web application. The successful operation of the application is very …
html meta-tags w3c-validationI'm using w3c markup validator. I get this error: Line 169, Column 60: & did not start a character reference. (& …
html w3c-validationPossible Duplicate: Does <STYLE> have to be in the <HEAD> of an HTML document? I am …
html css w3c-validationFor better SEO I need put some meta on my page like this: <!-- Schema.org markup for Google+ …
seo meta-tags w3c-validation schema.org microdataSo I've been playing with Google's +1 button trying to get it on my website, but it's not W3C compliant. …
javascript w3c w3c-validation google-plus-oneI have created a webpage (http://www.snow4life.yum.pl) that was rendered properly in firefox, chrome etc. Of …
css internet-explorer xhtml w3c-validation quirks-mode