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VAST XML File Size Detector

Scan your VAST Video to determine the XML file size.

Check 37+ ad quality tests for ad performance — validate against IAB VAST 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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XML File Size

The total size of the XML file that was downloaded, in bytes.

Why do we test it?

Users on slow networks may have to wait some time before the XML file has been downloaded. During that time, no video can be played. This has a negative impact on user-experience.