JPG: The Universal Photo Standard
Joint Photographic Experts Group (JPG (or JPEG)) is the most widely used raster image format. It uses “lossy” compression to significantly reduce file size, making it the standard for web photos and social media.
JPG is all about efficiency. It works by grouping similar pixels together and removing detail that the human eye is less likely to notice. For example, a high-res photo might be 10MB as a TIFF but only 500KB as a JPG, allowing it to load instantly on a smartphone.
Frequently Asked Questions
These are the blocky, blurry “smudges' that appear in a JPG when the quality setting is pushed too low.
No. Every pixel in a JPG must have a color. If you save a transparent image as a JPG, the transparent areas will turn white by default.
Every time you open, edit, and re-save a JPG, the quality degrades further because the compression algorithm runs again.
Usually, a quality of 60-80% is the “sweet spot” where the image looks perfect to the human eye but the file size is very small.
Yes. JPG supports both RGB (for web) and CMYK (for print), making it a versatile format for sending proofs to a printer.
A type of JPG that loads in “waves” on a slow internet connection, starting blurry and becoming sharper as more data arrives.
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