Ask them: "Can you please export this as a JPG and send it to me?" (This is the easiest method).
Be cautious of websites claiming to be direct "KSD to JPG" converters. Because .ksd files are either encrypted or audio-based, most generic online converters will fail to process them. ksd file to jpg converter
When you Google "ksd file to jpg converter," you will find dozens of generic online conversion sites (like Convertio, Zamzar, or AConvert). Ask them: "Can you please export this as