Meta ad.size Detector

Upload your HTML5 Ad to check if the meta tag ad.size is present.

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

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smart_display settings_system_daydream panorama

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Validate against:

Ad Spec: IAB Ad Guidelines

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Meta tag ad.size

The meta ad size defines the dimensions of the ad unit, such as width and height, that the HTML5 ad will display in.

Why do we test it?

Correct meta ad size ensures that the ad fits within the intended space on the publisher's site. Mismatched sizes can cause the ad to display incorrectly, negatively affecting the user experience and possibly leading to ad rejection by publishers. Some publishers require it to streamline their ad operations.