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HTML5 Missing Asset Checker

Upload your HTML5 Ad to detect if it has missing assets.

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

Go ahead, just
drop your ad !
HTML5 Zip
Ad Tag
VAST
Video
Image
Audio
smart_display settings_system_daydream panorama
Drop your HTML5 creatives here
ZIP Archive
Validate against:
Ad Spec: IAB Ad Guidelines
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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.