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HTML5 Missing Asset Checker

Scan your ad tag to detect if it has missing assets.

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

Go ahead, just
copy/paste your tag !
HTML5 Zip
Ad Tag
VAST
Video
Banner

Missing Assets

This test checks if any assets used by the ad return a 404 (not found) error.

Why do we test it?

Missing assets can break the ad's functionality or appearance, leading to wasted impressions and a negative user experience.