Before sending your banner into the world, it's smart to make sure it’s in tip-top shape. The HTML5 validator is a quick and easy way to ensure your exported creative meets all requirements across DV360, Campaign Manager 360, and Google Ad Manager.
How to Validate Your HTML5 Banner Before Go-Live
Here’s how to run a final check before hitting publish:
Head over to the HTML5 Validator.
Upload your .zip file – this is what you exported from Zuuvi.
Hit "Validate".
Review the results:
✅ Green checkmarks? You’re good to go!
⚠️ Any issues? The validator will show you exactly what needs fixing (e.g. file size, code errors, missing tags).
Go back to Zuuvi to make the required changes, then re-export and test again.
