SVG — vector graphics — is fundamentally different from JPG. Whereas JPG saves photos as a pixel grid, SVG saves graphics as mathematical definitions of geometric shapes. Which means SVG files work at all sizes — from a small icon to a large banner — with no quality loss.
Changing JPG to SVG is a operation called vectorization, and it is particularly valuable for illustrations and flat artwork.
When converting JPG to SVG, it is essential to know what the conversion actually does. A JPG is a bitmap image — a set grid of dots. An SVG is a vector image — a set of mathematical instructions that a browser displays as the image.
The conversion works great for simple images with distinct shapes and few colors — icons, logos, symbols and illustrations. It does not work for complex photos with thousands of more info colors.
For best output, Illustrator's Image Trace function gives the most control. Open your JPG in Illustrator, click the graphic, access the Image Trace panel and select an relevant setting.
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