Is there a guide how to upload item filters?

I went to the filter exchange and saw some I really want to try out, however there are no instructions where to put the .json file or what to do with it. Wouldn't it make sense to include that on the Filter Exchange page? Anyway, what do I do now that I downloaded the file? Thanks ahead of time.

If you're talking about the filter exchange page on the sin war website (or median-xl armory website), simply click on the filter you like, click on the copy to clipboard button, go to the loot filter settings in-game and on the top you'll see an import configuration from clipboard button

Thumbs up! Thank you. Kind of obvious, but still pretty unintuitive.