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Host-initiated Subload Detector

Upload your HTML5 Ad to check the host-initiated subload.

Collect 39+ data points and validate against IAB ad guidelines

HTML5 Zip
Ad Tag
VAST
Video
Image
Audio
 
smart_display settings_system_daydream panorama
Drop your HTML5 Ad here
Format: ZIP
auto_stories
API Docs
Go ahead, try
it yourself !

Load Size: Subload

After the ad appears, it might load more data in the background. This is called a subload.

Why do we test it?

While subloading can add more features to an ad (like animations), too much subloading can make the ad run slower. Keeping subloads light helps the ad run smoothly without affecting the user's browsing experience.