Image format
.jpg
Joint Photographic Experts Group
JPG (also known as JPEG) is the most widely used image format for photographs and complex images. It uses lossy compression to significantly reduce file size while maintaining acceptable visual quality.
MIME type
image/jpeg
Developer
Joint Photographic Experts Group
Introduced
1992
Advantages
- Very small file sizes for photographs
- Universally supported everywhere
- Adjustable compression quality
- Ideal for web and email sharing
Limitations
- Lossy compression — quality degrades with each save
- No transparency support
- Not suitable for text or sharp-edge graphics
- Artifacts visible at high compression
When to use JPG
Photography and photo sharing
Website hero images and backgrounds
Email attachments
Social media uploads
Technical details
JPEG uses DCT (Discrete Cosine Transform) compression. It supports 24-bit RGB color and CMYK for print. Quality can be set from 1-100, with 75-85 being the typical sweet spot for web use.
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