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Cookies Dropped Detector

Scan your ad tag to detect all cookies dropped.

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

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Ad Tag
VAST
Video
Banner

Cookies Dropped

This checks if the ad tag drops any cookies, particularly third-party cookies.

Why do we test it?

Many browsers and platforms now limit or block third-party cookies for privacy reasons. Ads that drop too many cookies, or non-compliant cookies, may face restrictions or reduced performance.