nothing is redrawn
Why resizing an SVG is lossless
A raster image has to be redrawn at the new size, and detail is lost or invented in the process. An SVG carries the drawing instructions instead, so resizing is just a note about how big to render it. Every path, colour and gradient in the file stays exactly as it was.
That note is the width and height pair. The viewBox underneath defines the internal coordinate system and is left alone — which is the whole reason the shapes scale rather than get cropped.
three steps
How to resize an SVG
01
Drop the SVG
Pick a .svg file — it stays on your device.
02
Set the size
Type a width, pick a percentage, or go responsive.
03
Download
You get the same artwork at the size you asked for.