Hello i'm trying to upload webp images from media picker but umbraco does not see webp format as an image format instead it sees as a normal file how can i change that?

Hey, you can override the default settings for this in your appsettings.json file. https://docs.umbraco.com/umbraco-cms/reference/configuration/contentsettings#imaging You would need to use the default value and add in webp as well I believe.

seems not to be working atm

which Umbraco version are you using exactly?