SVG — the SVG format — is completely separate from JPG. JPG saves photos as a pixel grid, SVG stores images as mathematical descriptions of paths and colors. This means SVG images work at every size — from a tiny icon to a billboard — without pixelation.
Changing JPG to SVG is a process called raster to vector conversion, and it is especially useful for icons and simple graphics.
When converting JPG to SVG, it is essential to understand what the conversion actually does. JPG files are a pixel-based image — a fixed grid of dots. An SVG is a mathematical image — a collection of paths that a browser uses to draw the artwork.
The conversion works great for simple images with clear shapes and minimal colors — icons, logos, symbols and illustrations. It does not work for photographic images with fine detail.
For professional results, Illustrator's Image Trace tool gives the most control. Load the image in Illustrator, highlight the image, open the Image website Trace settings and pick an relevant setting.
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