What is a video validator?

A video validator is a tool that helps you ensure your video ads meet industry standards and function correctly across different platforms.

Why is video ad validation important?

Validating your video ads ensures they comply with IAB standards, deliver a seamless user experience, and perform reliably across various environments.

What aspects of a video ad does the validator check?

The video validator checks various aspects such as file format, size, resolution, codec, bitrate, frame rate, and other important properties that affect video quality and performance.

How can I use the video validator?

You can use the video validator by providing a URL to the video. The tool will analyze the video and provide detailed results and recommendations.

Video Aspect Ratio test Validation

Test Aspect Ratio for compliance and performance issues.

How to test a video ad media file assets for compliance and performance issues.

Enter your video URL below to start the validation

How to test video ad media assets

Testing profile - Video Aspect Ratio test

VAST In-Stream Video Test Display Ads Video Test

What we test for

When you run a test in our Video Validator, we check your video file for the following common properties and best practices of video ad creatives:

Video Aspect Ratio Test

Video Aspect Ratio test analysis describes the proportional relationship between the width and height of the video. Common aspect ratios include 16:9 (widescreen) and 4:3 (standard). Using standard aspect ratios ensures compatibility across various devices and platforms, providing a better viewing experience.

Video Aspect Ratio test Profile Accurate aspect ratios are essential for consistent visual rendering. Misaligned ratios can cause display issues, distortions, or rejections across ad delivery systems, ultimately reducing campaign effectiveness.Common video aspect ratios include 16:9 (widescreen) and 4:3 (standard). Knowing the target platform’s requirements is crucial for optimal ad delivery.

Why validate video ads

Video ads don’t just need to play — they need to meet industry standards, deliver a seamless user experience, and perform reliably across every environment. Validating your video ads ensures compliance with IAB specifications such as VAST, OMID, and SIMID, which define how ads should load, track, and interact with players. When these standards aren’t met, ads can fail to render correctly, misreport impressions, or break entirely in certain placements.

A key reason to validate is to prevent issues flagged by Heavy Ad Intervention (HAI) — Google Chrome’s system that automatically unloads ads consuming excessive CPU, network, or memory resources. Heavy ads not only waste media spend but also degrade page performance and user trust. By validating your creatives, you can identify oversized files, inefficient scripts, and playback errors before they reach the end user.

Ultimately, video ad validation protects both your ad performance and your audience’s experience. Valid ads load quickly, respect device resources, and track properly — leading to better completion rates, accurate analytics, and higher engagement. It’s the difference between a flawless, standards-compliant ad and one that disrupts the viewer, drains resources, or gets blocked entirely.

Looking to validate your VAST tags?

Once your video file is validated, take the next step with our VAST Tag Tester It helps you understand how your ad behaves in real-world VAST players — verifying tracking events, error responses, wrapper chains for true IAB compliance and much more. Learn by our VAST examples on how to structure and optimize your VAST tags for maximum ad performance.