SVG — the SVG format — is completely separate from JPG. JPG encodes pictures as a raster of pixels, SVG encodes graphics as mathematical definitions of geometric shapes. Which means SVG files work at every size — from a tiny icon to a billboard — without any loss of sharpness.
Transforming JPG to SVG is a technique known as image vectorization, and it is especially useful for logos and flat artwork.
When converting JPG to SVG, it is essential to know what the conversion actually does. JPG files are a bitmap image — a static grid of pixels. SVG files are a scalable image — a collection of paths that a browser displays as the artwork.
The conversion works great for simple images with distinct shapes and few colors — get more info logos, icons, silhouettes and line art. Results are poor for detailed photographs with fine detail.
For professional results, Illustrator's Image Trace function gives the most flexibility. Load the image in Illustrator, click the graphic, open the Image Trace dialog and select an relevant setting.
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