JPG file

This page contains information on the JPG file extension (Joint Photographic Experts Group), a popular image file format

File extension	.jpg
Category	Image File
Description	JPG's are often used for web sites and email as they are generally smaller file sizes as they are lossy meaning that some image quality is lost when the JPG is compressed and saved. The resultant 'lossy' file means that quality can never be recovered. The JPG format is often used in digital camera memory cards. The JPG file is a great format as it often manages to compress files to 1/10 of the size of the original file which is especially good for saving on bandwidth.
Actions	Convert JPG file View other image file formats
Technical Details	JPG is a graphical file format for editing still images, it offers a symmetrical compression technique which is processor intensive and time consiming in both compression and decompression. JPEG is a joint standard of the International Telecommunications Union (ITU-T T.81) and the International Organization for Standardization (ISO 10918-1). JPEG involves a lossy compression mechanism using discrete cosine transform (DCT). Compression rates of 100:1 can be achieved, although the loss is noticeable at that level. Compression rates of 10:1 or 20:1 yield little degradation in image quality.
Associated programs	Adobe Photoshop Apple Preview Corel Paint Shop Pro Microsoft Windows Photo Gallery Viewer
Developed by	The JPEG Committee
MIME type	image/jpeg
Useful links	More detailed information on JPG files Choosing the best way to compress a JPG file Convert JPG file

Using Zamzar it is possible to convert JPG files to a variety of other formats