SVG — the SVG format — is completely separate from JPG. Whereas JPG stores photos as a grid of pixels, SVG saves graphics as mathematical definitions of shapes, lines and colors. This means SVG graphics work at every size — from a small icon to a billboard — without loss of sharpness.
Converting JPG to SVG is a process referred to as raster to vector conversion, and it is particularly valuable for icons and simple graphics.
Prior to converting JPG to SVG, it is necessary to realize what the conversion actually does. A JPG is a raster image — a static grid of dots. SVG files are a mathematical image — a collection of paths that applications displays as the artwork.
This works extremely well for simple images with defined shapes and few colors — icons, logos, symbols and line art. It does not work for photographic images with complex gradients.
For professional results, Illustrator's Image Trace tool offers the most precision. Open your JPG in Illustrator, click the graphic, open the Image get more info Trace dialog and pick an suitable option.
Visit alljpgconverters.com for a totally free web-based JPG to SVG converter without software necessary.