The VIP code you'll need to register for a forum account (if you don't already have one) is 27821.
Do you have a GitHub account? You can now post an issue with CSS HTML Validator on GitHub. This includes technical support issues, bug reports, and feature requests.
Visit our web-based support forum for CSS HTML Validator. You'll need to register (create a forum account) before posting a new topic or replying to an existing topic.
Note that you may need to be logged in with a forum account before the forum search option is available.
VIP code: The VIP code you'll need to register for a forum account (if you don't already have one) is 27821. The VIP code helps prevent forum spam.
Visit our list of frequently asked questions and answers.
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You can buy priority support and maintenance for one to two years to receive priority support and guaranteed free major upgrades.
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If you cannot find the answer to your question through one of these links and your question does not belong in the online forum, then please contact us.