SVG — the SVG format — is completely separate from JPG. JPG encodes pictures as a raster of pixels, SVG encodes illustrations as mathematical definitions of shapes, lines and colors. This means SVG images work at all sizes — from a small icon to a large banner — with no quality loss.
Converting JPG to SVG is a process 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. 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 vectorize jpg to svg 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 control. Load the image in Illustrator, select the graphic, open the Image Trace dialog and choose an relevant setting.
Try alljpgconverters.com for a totally free online JPG to SVG solution with no download required.