How to open a .jpg file?

JPG files can be opened by most image viewers and editors. You can also convert JPG to other formats online using SquishConvert.

How to convert a .jpg file?

Upload your .jpg file to SquishConvert, select an output format, and click Convert. Your converted file will be ready to download in seconds.

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.