HTML Checking for Large Sites
Rocket Validator automatically scans your sites for accessibility issues using the W3C Validator,
hosted on our own servers and integrated into our web crawler.
When was the last time you validated your whole site?
Keep your sites healthy checking for A11Y/HTML issues on an automated schedule.
Element X is missing required attribute Y.
The element X requires an attribute Y, but it’s not present. Check that element and add the required attribute, like in <X Y="value" />.
Related W3C validator issues
The src attribute for <img> tags is required, to define the source of the image, like in this example:
<img src="photo.jpg" alt="wombat" />
<img> tags used to display images require the attribute src to indicate the source of the image, for example <img src="/img/photo.jpg" />.
June 2021 Promotion
All Rocket Validator Pro features at half the price. Offer only valid until June 30th.