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Image Chroma Subsampling Detector

Upload your banner ad to check the image's chroma subsampling.

Collect 13+ data points and validate against IAB ad guidelines

HTML5 Zip
Ad Tag
VAST
Video
Image
Audio
 
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Drop your image file here
Format: PNG, JPG, GIF
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API Docs
Go ahead, try
it yourself !

Chroma Subsampling

Chroma subsampling is a method used to encode images by implementing less resolution for color information than for black/white information. A common subsampling type used for videos is 4:2:0.

Why do we test it?

Chroma subsampling takes advantage of the human's visual system's lower acuity for color differences than for black/white. Savely removing information that we can't notice saves bytes, resulting in lower file sizes.