SVG — vector graphics — is essentially separate from JPG. JPG encodes pictures as a raster of pixels, SVG encodes illustrations as mathematical descriptions of paths and colors. This means SVG images scale to any size — from a small icon to a billboard — without loss of sharpness.
Transforming JPG to SVG is a technique referred to as raster to vector conversion, and it is very beneficial for icons and clean graphics.
Before converting JPG to SVG, it is important to realize what happens. JPG files are a pixel-based image — a fixed grid of image pixels. SVG files are a vector image — a collection of paths that applications displays as the graphic.
The conversion works great for simple images with defined shapes and few colors — icons, logos, symbols and illustrations. Results are poor for photographic images with fine detail.
For best output, Adobe Illustrator's Image Trace tool offers the most control. Load the image in Illustrator, highlight the image, read more open the Image Trace panel and pick an relevant setting.
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