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VAST Tag Tester

Test and inspect VAST video advertising tags. Analyze VAST responses, media files, impressions, tracking events, click-through URLs and ad playback.

Important: Browser security policies such as CORS can prevent this page from reading the XML response from some VAST URLs. If a URL cannot be fetched directly, paste the VAST XML response into the XML tester below.

🔗 Test VAST Tag URL

VAST Ad Tag URL Paste your VAST ad tag URL here.

📄 Test VAST XML

VAST XML Response Paste the VAST XML response directly into the box.

📊 VAST Analysis

VAST Version

Response Type

Ads

Media Files

Diagnostic Checks

Ad Information

Ad	ID	Type	Duration	Impression	ClickThrough

🎥 Media Files

Type	MIME Type	Width	Height	Bitrate	URL

📡 Tracking Events

Event	Tracking URL

What Does This Tool Check?

PubsRate analyzes the VAST response and looks for common advertising components including the VAST version, ad type, impressions, media files, duration, click-through information and tracking events.

The tool is intended for development, troubleshooting and educational purposes. A successful XML response does not necessarily mean that an ad will successfully play in every player, device or advertising environment.