On the Web App version of Photoroom, you can download multiple designs at once. The files will download in a zip file in your browser. You can unzip the folder and then use the image files however you like, for example, you could upload them to a marketplace site or your web site.
To download multiple designs as image files on the Web App:
Log in to Photoroom at app.photoroom.com.
Select the workspace that contains the designs you want to export as image files.
Select Designs.
Check the box (top corner) for each design that you want to download.
Select Download in the bar at the bottom.
The selected designs download in the browser in a zip file. It is named Photoroom.zip.
Find the Photoroom.zip folder on your computer (usually your Downloads folder) and unzip it.
Use the image files in the unzipped folder.