SVG — the SVG format — is completely separate from JPG. JPG stores images as a grid of pixels, SVG stores illustrations as mathematical descriptions of paths and colors. This means SVG images scale to any size — from a small icon to a massive print — without quality loss.
Changing JPG to SVG is a process 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 collection of paths that a browser displays as the graphic.
This works extremely well for 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 website and select an relevant setting.
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