SVG — the SVG format — is completely separate from JPG. JPG encodes pictures as a raster of pixels, SVG encodes illustrations as mathematical definitions of shapes, lines and colors. This means SVG images work at all sizes — from a small icon to a massive print — with no quality loss.
Changing JPG to SVG is a process called raster to vector conversion, and it is very beneficial for illustrations and clean graphics.
Prior to converting JPG to SVG, it is important to understand what the conversion actually does. JPG files are a pixel-based image — a static grid of pixels. SVG files are a mathematical image — a collection of paths which software uses to draw the artwork.
Results are excellent for clean images with clear shapes and minimal colors — icons, logos, symbols and illustrations. It does not work for complex photos with complex gradients.
For quality conversion, Adobe Illustrator's Image Trace feature offers the most control. Load the image in Illustrator, select the graphic, open the Image Trace dialog and choose an relevant setting.
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