Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as mso.
An invalid CSS property is being used. Properties starting with
mso- are commonly defined by Microsoft products like Office and Outlook.
These properties, like
mso-margin-top-alt and others starting with
mso- are not standard CSS properties.
50,000 Accessibility and HTML checks per month. Fully automated.
Let our automated scanner check your large sites using Axe Core and W3C Validator.