Rayo PDF GOWhat is the JPG format?
The most common image format for photos: what lossy compression is and when it is a good fit.
JPG (or JPEG, for Joint Photographic Experts Group) is the most widely used image format for photographs. It greatly reduces file size because it discards information the eye barely notices: this is lossy compression.
It works very well for photos with gradients and many colors. It does not support transparency, and if it is saved several times with heavy compression, visible artifacts build up, especially around text and sharp edges.
For screenshots, logos or images with text, PNG is usually better. For putting photos into a PDF, JPG is a good choice: it keeps the document light.
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Frequently asked questions
Are JPG and JPEG the same?
Yes. They are the same format; .jpg is the short extension inherited from older systems.
Keep learning
See the whole knowledge base ›- File formatPNG
Lossless images with transparency: when to choose PNG over JPG.
- File formatWebP
Google's modern format for web images and why some programs cannot open it.
- GlossaryLossy and lossless compression
How a file's size is reduced and what is sacrificed in each case.
- GlossaryResolution and DPI
What dots per inch means and how much resolution a scan needs.
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