With program convert, part of package ImageMagick.
You can't. JPG is pictures, excel is a worksheet with names and numbers. You might be able to turn an excel-file into a JPG, but then you would no longer be able to do calculations in the worksheet.
.jpg and .jpegs are non-animated pictures/images.
.jpg
http://www.phoenixchoir.org/img/choir99.jpg
/Users/will/Desktop/P05333C3.jpg
If you took the picture with your camera lens, it should already be a a .jpg upon being transferred to your computer. You can also open the pictures in an image editing program such as Paint or Photoshop, then re-save them (Save-As) .jpg. There is absolutely no need to use websites or download anything in order to convert images to .jpg, these downloads are usually spammy, malware or malicious.
JPEG is the same as JPG. However if you really want to rename your .jpeg images into .jpg, you can go to Command Prompt, navigate to the folder of where your pictures are stored, and type in: ren *.jpeg *.jpg
http://www.gizmag.com/pictures/hero/2234_02.jpg
jpg is a type of pictures that is taken by a phone.. (small size) low quality. img is big one and high quality sometimes from digi cams or in screen shots on pc or lappy :))
http://wpcontent.answers.com/wikipedia/commons/thumb/c/c8/Taj_Mahal_in_March_2004.jpg/300px-Taj_Mahal_in_March_2004.jpg See related link.
http://blackcelebritykids.files.wordpress.com/2007/12/fashion-show-2007.jpg
Summer 2009 AnnaSophia Robb bikini pictures (with friend Molly Beans): http://annasophiarobbsucks.com/annasophia_robb_bikini_002.jpg http://annasophiarobbsucks.com/annasophia_robb_bikini_003.jpg http://annasophiarobbsucks.com/annasophia_robb_bikini_004.jpg http://annasophiarobbsucks.com/annasophia_robb_bikini_005.jpg Older pictures: http://www.flickr.com/photos/24602237@N02/3430778787/sizes/o/ http://annasophia-robb.org/gallery/displayimage.php?pid=13446&fullsize=1