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

Image

Audio

Validate against:

Ad Spec: IAB Ad Guidelines

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

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