JPEG
JPEG image
A widely used image format for digital photography and web graphics. It uses lossy compression to reduce file size.
What is JPEG image?
JPEG (Joint Photographic Experts Group) is a standardized image compression method and file format. It was created by the Joint Photographic Experts Group committee in 1992. It's primarily used for storing digital photographs and other photorealistic images due to its efficient lossy compression, which allows significant reduction in file size with minimal perceptible quality loss.
Advantages
- Small file sizes (due to lossy compression)
- Widely supported by almost all devices and software
- Good for photographs and complex images with many colors
- Adjustable compression level
Limitations
- Lossy compression (quality loss with each save/edit)
- Does not support transparency (alpha channel)
- Not ideal for images with sharp lines, text, or solid blocks of color (artifacts can appear)
- Not suitable for animations
How to open JPEG image files
Web browsers (Chrome, Firefox, Edge, Safari)
Image viewers (Windows Photos, macOS Preview, IrfanView)
Image editors (Adobe Photoshop, GIMP, Paint.NET)
Most operating systems natively
Common use cases
- Digital photography storage
- Web images (banners, product photos, blog post images)
- Email attachments
- Social media sharing
- Scanned documents with continuous tone images
Explore other formats
Frequently asked questions
There is no difference. JPG is simply a truncated version of the .jpeg file extension, used in older Windows systems that required 3-letter extensions.
JPEG is a lossy compression format. This means some image data is permanently discarded during compression to achieve smaller file sizes.
No, JPEG does not support transparency (alpha channel). For images requiring transparency, formats like PNG or GIF are typically used.
JPEG is best suited for photographs and images with continuous tones where file size is a concern, such as web images, digital camera photos, and email attachments.
Yes, each time a JPEG image is edited and re-saved, it undergoes another round of lossy compression, which can further degrade image quality.