Banner Ad File Extension Checker

Upload your banner ad to check the file extension.

Check 13+ ad quality tests for ad performance — validate against IAB banner ad guidelines

Go ahead, just

drop your ad !

HTML5 Zip

Ad Tag

VAST

Video

Image

Audio

smart_display settings_system_daydream panorama

Drop your banner ads here

PNG, JPG, GIF

Validate against:

Ad Spec: IAB Ad Guidelines

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File Extension

The file extension indicates the type of image format being used, such as .png or .jpg. Each format has its advantages depending on the use case.

Why do we test it?

Ensuring the correct file extension is important because different formats support different features. PNG, for example, supports transparency, while JPG is more suitable for smaller file sizes. Using the right format ensures compatibility with ad networks and optimizes the trade-off between quality and load speed.