SVG — vector graphics — is fundamentally different from JPG. While JPG stores images as a grid of pixels, SVG stores images as mathematical descriptions of paths and colors. Meaning SVG images scale to any size — from a small icon to a massive print — without quality loss.
Changing JPG to SVG is a operation called vectorization, and it is very beneficial for illustrations and clean graphics.
Prior to converting JPG to SVG, it is important to understand what happens. JPG files are a pixel-based image — a fixed grid of image pixels. SVG files are a mathematical image — a set of mathematical instructions that a browser displays as the graphic.
This works extremely well for website 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 dialog and select an relevant setting.
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