W3C Validation Testing
Now our Automated Screenshot service provides W3C validation information for the provided test page! On the screenshot result page (see sample below), you will see a summary of any HTML and CSS validation errors/warnings with a link to the W3C validation website for detailed information.
This summary is also maintained for each version of screenshot tests you run. This means that as you review screenshot versions of your page, you can also review the number of W3C validation errors over time.