An image that has been converted from a lossy image format to a lossless image format. Usually this is a PNG image ({{filetype:png}}) full of [[JPEG artifacts]], because it was originally a JPEG.

Lossy-lossless images should not be uploaded to Danbooru when the original is available. It is Danbooru policy to delete [[third-party edit|third-party]] lossy-lossless images when the original is available. See [[third-party edit]]. 

h4. See also

* [[third-party edit]]
* [[lossless-lossy]]
* [[image sample]]
* [[md5 mismatch]]
lossy-lossless