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HTML Syntax Error Detector

Upload your HTML5 Ad to check if it has syntax errors.

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

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Ad Tag
VAST
Video
Banner
smart_display settings_system_daydream panorama
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Syntax Errors

This checks for any errors in the syntax of the HTML, CSS, or JavaScript in the ad.

Why do we test it?

Syntax errors can prevent the ad from rendering correctly or functioning as intended, leading to missed impressions or poor user experience.