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Heavy Ad Intervention Test (HAI)

Scan your ad tag to check if Chrome blocks it.

Check 32+ ad quality tests for ad performance — validate against IAB display ad guidelines

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HTML5 Zip
Ad Tag
VAST
Video
Banner

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.