HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

Malformed comment syntax has been found, check out the affected comment.

HTML comments are helpful to leave notes about the code right next to it. To create a comment, it must start with <!-- and end with -->, as in this example:

<!-- Good comment -->

<!--
Comments can
be multi-line
-->

A common cause for a malformed comment is using too many hyphens (-) as in this example:

<!-- Wrong comment --->

When was the last time you validated your whole site?

Keep your sites healthy checking for A11Y/HTML issues on an automated schedule.