HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

HTML issues tagged as ISO 639-1.

Instead of using the isolang attribute to define the language of the document, you can use lang with an ISO 639-1 two character code.

For example, for Portuguese:

<html lang="pt">

When was the last time you validated your whole site?

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