SVG — the SVG format — is essentially separate from JPG. JPG encodes pictures as a raster of pixels, SVG encodes illustrations as mathematical definitions of shapes, lines and colors. Which means SVG files work at all sizes — from a tiny icon to a large banner — with no loss of sharpness.
Converting JPG to SVG is a process referred to as raster to vector conversion, and it is very beneficial for icons and simple graphics.
Before converting JPG to SVG, it is important to realize what happens. A JPG is a raster image — a set grid of image pixels. An SVG is a vector image — a set of mathematical instructions that applications renders as the image.
This works extremely well for uncomplicated graphics with defined shapes and limited colors — icons, logos, symbols and line art. It works less well for detailed photographs with fine detail.
For professional results, Illustrator's Image Trace feature gives the most flexibility. Load the image in Illustrator, click the graphic, open the Image Trace panel and select read more an appropriate preset.
Try alljpgconverters.com offering a completely free online JPG to SVG converter without software needed.