YouTube VAST Validator

SUBMIT URL

Welcome to the YouTube VAST Validator Tool! You can use this tool to verify that your VAST ad tags meet specifications for third party served video ads on YouTube. Just input the VAST tag, and we'll show you a summary of the results.

Try it out

Try it out using this sample tag:

https://ytvastqa.appspot.com/static/sampletag/vast.xml

Video ads on YouTube

For specifications please see:

Video Ads Specs

Certified 3PAS Vendors

Third Party Serving Policies & Attributes

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VAST Tag:

This is the submitted VAST tag. Clicking the tag will open it in a new browser window.

[[qaResults.getVastTagUrl()]]

Overall Verdict:

This section shows the overall verdict for the submitted VAST tag.
If the verdict is FAIL you need to fix the listed errors and validate again until you get overall verdict PASS.

Errors:

This sections lists the overall errors in the submitted VAST tag.

Unique Media Files:

This section lists all media files used in all Ads and creatives in the submitted VAST tag.

[[mf.getUrl()]]

Cachebusting:

This section shows the result of server-side cachebusting check for the VAST tag.

Clickthrough url(s):

This section shows the clickthrough URLs across possible tag variations.
This is only a FYI at this point and can be ignored.

Video Ad:

[[url.getUrl()]]

Estimated destination url:

[[url.getDestination()]]

Not detected

Companion Ad:

[[url.getUrl()]]

Estimated destination url:

[[url.getDestination()]]

Not detected

Preview:

See a forced ad preview of your VAST tag in the YouTube player.
The link will open a new browser window.

[[qaResults.getForceVastTagUrl()]]

Ads:

This section shows validation results for each Ad in the submitted VAST tag.
For failed Ads, please note the errors and details on fixing the issue.

Errors:

Warnings:

Impression Pixels:

[[pixel]]

Media Files:

[[mf]]