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VAST Video File Extension Detector

Scan your VAST Video to detect the video file extension (MP4, WebM).

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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File Extension

The file extension of the video file, for example: mp4.

Why do we test it?

Publishers commonly have a restricted number of video file types they accept.