External Asset Detector

Upload your HTML5 Ad to check if it loads external 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

arrow_drop_down

External Assets

External assets refer to files such as images, scripts, or fonts that are hosted outside the ad's ZIP package and need to be loaded from external servers.

Why do we test it?

External assets can increase load times (due to additional DNS lookups), reduce reliability, and introduce privacy risks. This test ensures all essential assets are included in the ZIP, avoiding dependencies that could hinder performance or violate platform guidelines.