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Heavy Ad Intervention Test (HAI)

Upload your HTML5 Ad to check if Chrome blocks it.

Check 39+ ad quality tests for ad performance and validate against IAB HTML5 ad guidelines

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Ad Tag
VAST
Video
Banner
smart_display settings_system_daydream panorama
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Heavy Ad Intervention

This detects whether the ad will trigger Chrome's heavy ad intervention.

Why do we test it?

Ads that consume too much CPU, memory, or bandwidth may be blocked by Chrome to preserve the user experience. Avoiding heavy ads ensures compliance and prevents ads from being blocked.