PhotoWatermark Professional can load and save JPEG, GIF, PNG, Bitmap, TIFF, JPEG2000 images so conversion can be done between them. If you wish to save all your pictures as "JPEG", you choose the JPEG tab in the Convert and rename options window. You do so with others. If you do not want to perform conversion, you choose the "As is" tab. Raw image files cannot be saved. Therefore, they will be converted into JPEG unless you explicitly choose another format.
See also:
Digital camera raw image support
Batch process images
Watermark your pictures
File menu