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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
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.