bmp file to create
You have created an image in an image-editing program, you can save it normally as a Windows Bitmap (BMP).
- You can use Gimp, you can use the Format, not directly to the Store, but must find the way via "file -> Export as" and as the Format .bmp select.
- In Photoshop you can take a picture directly via "file -> save as" to a Bitmap using BMP as Format. However, you need to make sure before using "image -> mode", that the hooks are set at "RGB color" and "8-Bit channel".
- Use Paint for image editing, save your image using "file -> save as" and select BMP as the Format.

BMP Export in Gimp
Incidentally, you can also PDF to BMP convert. For instructions, see the next article.
