jpg; .jpeg
JPEG (Joint Photographics Experts Group) files are true color (16.7 million colors, or 24-bit). JPEG images are compressed using a "lossy" compression algorithm, called JPEG. This means that files may degrade in quality when they are JPEG encoded. However this degradation is not noticeable for most scanned photographs and images with smoothly colored areas. Do not use JPEG encoding on line art or cartoon images. JPEG files are significantly smaller than most other formats and can be opened and saved with many graphics programs on all platforms.