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 Google Ads, 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.
