If you need to batch-convert the extracted images to JPG, you can use: A powerful command-line tool. iLoveIMG : For online conversion. Important Considerations
Locate the .rpa file (usually in the /game/ folder of the visual novel). rpa to jpg
Remember that game assets belong to the developers. Extracting images for personal use (like wallpapers) is generally fine, but republishing them is often prohibited. If you need to batch-convert the extracted images
Because an RPA file is a container, you cannot simply rename it to .jpg or use a photo editor to open it. You have to it first. rpa to jpg