If you strictly need format for file size compression or web optimization, you must complete one final conversion step. Warning: Loss of Transparency
Since these files are encrypted, a simple "right-click and rename" won't work. You’ll need a tool that can "decrypt" the data back into a readable image format. Step 1: Use an RPG Maker Decrypter rpgmvp to jpg
Select all decrypted images, right-click, choose Quick Actions , click Convert Image , and select JPEG . If you strictly need format for file size
I can provide specific terminal commands or tool links based on your setup. Step 1: Use an RPG Maker Decrypter Select
The .rpgmvp format is a file that has been encrypted by RPG Maker MV. Developers use this encryption to protect their custom assets from being easily stolen or modified by players. Because the file structure is altered, your computer sees it as "unknown data" rather than an image. Why Convert to JPG?