You are thinking of DNG which is more of a container format. It can use multiple...

		Gigachad 3 days ago \| parent \| context \| favorite \| on: The case against JPEG XL You are thinking of DNG which is more of a container format. It can use multiple image formats internally to record the actual image, one of them being JPEG-XL. iPhone raw images are actually a jpeg xl inside the DNG.
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