SVG — the SVG format — is essentially distinct from JPG. Whereas JPG stores images as a grid of pixels, SVG encodes illustrations as mathematical definitions of geometric shapes. Which means SVG graphics scale to any size — from a small icon to a large banner — with no loss of sharpness.
Transforming JPG to SVG is a operation called vectorization, and it is very beneficial for icons and simple graphics.
Before converting JPG to SVG, it is necessary to know what the conversion actually does. JPG files are a pixel-based image — a fixed grid of image pixels. An SVG is a scalable image — a series of geometric shapes which software uses to draw the graphic.
This works extremely well for uncomplicated graphics with defined shapes and limited colors — icons, logos, symbols and illustrations. It does not work for photographic images with thousands of colors.
For best output, Illustrator's Image Trace function gives more info the most control. Load the image in Illustrator, select the graphic, access the Image Trace settings and pick an appropriate preset.
Use alljpgconverters.com offering a totally free online JPG to SVG solution with no account necessary.