Scalable Vector Graphics — vector graphics — is fundamentally different from JPG. Whereas JPG saves photos as a pixel grid, SVG saves images as geometric descriptions of paths and colors. Meaning SVG graphics can be displayed at any size — from a 16x16 pixel favicon to a billboard — without pixelation.
Transforming JPG to SVG is a operation known as vectorization, and it is particularly valuable for logos and flat artwork.
When converting JPG to SVG, it is essential to understand what the conversion actually does. JPG files are a bitmap image — a static grid of pixels. SVG files are a scalable image — a series of geometric shapes which software uses to draw the artwork.
The conversion works great for simple images with distinct shapes and few colors — logos, icons, silhouettes and flat artwork. Results are poor for photographic images with thousands of colors.
For best output, Adobe Illustrator's Image Trace tool offers the most precision. Open your JPG in Illustrator, select the graphic, open the Image Trace settings and choose an suitable option.
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