Scalable Vector Graphics — the SVG format — is fundamentally different from JPG. Whereas JPG saves photos as a raster of pixels, SVG encodes illustrations as mathematical descriptions of geometric shapes. Which means SVG files work at any size — from a 16x16 pixel favicon to a billboard — with no pixelation.
Changing JPG to SVG is a operation known as raster to vector conversion, and it is very beneficial for icons and clean graphics.
When converting JPG to SVG, it is important to understand what happens. JPG files are a bitmap here image — a static grid of dots. SVG files are a scalable image — a series of geometric shapes that a browser displays as the artwork.
The conversion works great for clean images with clear shapes and minimal colors — icons, logos, symbols and illustrations. It does not work for complex photos with fine detail.
For best output, Adobe Illustrator's Image Trace tool offers the most control. Load the image in Illustrator, select the graphic, open the Image Trace dialog and select an suitable option.
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