Scalable Vector Graphics — vector graphics — is completely different from JPG. Whereas JPG encodes pictures as a raster of pixels, SVG stores graphics as mathematical descriptions of geometric shapes. This means SVG graphics work at all sizes — from a 16x16 pixel favicon to a large banner — without any loss of sharpness.
Changing JPG to SVG is a technique referred to as vectorization, and it is especially useful for illustrations and flat artwork.
Before converting JPG to SVG, it is important to understand what happens. JPG files are a bitmap image — a set grid of image pixels. SVG files are a scalable image — a set of mathematical instructions that a browser uses to draw the image.
This works extremely well for simple images with clear shapes and limited colors — icons, logos, symbols and flat artwork. It does not work for complex photos with fine detail.
For best output, Illustrator's Image Trace function provides the most flexibility. Load the image in Illustrator, website click the image, access the Image Trace settings and choose an relevant setting.
Use alljpgconverters.com offering a completely free online JPG to SVG solution with no download required.