.jpeg — Joint Photographic Experts Group
Joint Photographic Experts Group (ISO/IEC JTC 1/SC 29/WG 11) · 1992
JPEG (Joint Photographic Experts Group) is a common image file format used for storing digital images.
Key Features
- Lossy storage behavior for typical image workflows
- Common MIME type: image/jpeg
- Recognizable file signature: FF D8 FF
- Associated with Joint Photographic Experts Group (ISO/IEC JTC 1/SC 29/WG 11)
Best For
- Photographs with many colors
- Smaller file sizes for sharing
- Broad browser and device support
Less Ideal For
- Images needing transparency
- Logos or text-heavy graphics
- Repeated save-and-edit cycles
Common Use Cases
- Digital photography
- Web image publishing
- Emailing compressed photos
How to Open It
- On Windows, open the file with Paint or Adobe Photoshop.
- On macOS, open the file with Preview or Adobe Photoshop.
- If the file does not open, confirm that the extension really matches .jpeg and that the download or transfer completed without corruption.
What is a .jpeg file?
JPEG (Joint Photographic Experts Group) is a common image file format used for storing digital images. It employs lossy compression, which means some data is discarded to reduce file size, making it ideal for photographs and complex images. JPEG images are widely supported across web browsers, image editors, and digital cameras.
Programs That Open .jpeg Files
| Platform | Program | ||
|---|---|---|---|
| Windows | Paint | Free | Official |
| Adobe Photoshop | Paid | ||
| GIMP | Free | ||
| macOS | Preview | Free | Official |
| Adobe Photoshop | Paid | ||
| Pixelmator Pro | Paid |
Common Problems with .jpeg Files
Frequently Asked Questions
JPEG and JPG are essentially the same file format. 'JPG' is an abbreviation that was used primarily in Windows operating systems that limited file extensions to three letters, while 'JPEG' is the full extension.
No, JPEG uses lossy compression, which means some image data is discarded to reduce file size. This is why it's not ideal for images that require perfect accuracy, like medical scans or technical diagrams.
You can reduce the file size by adjusting the compression level when saving. A higher compression level will result in a smaller file size but lower quality, and vice versa.
Technical Details
JPEG files typically start with the hexadecimal marker `FF D8 FF`. The format supports a wide range of color depths and resolutions, and its compression algorithm can be adjusted to balance quality and file size.