sharp at 16 pixels
Why converting from a vector matters here
A favicon is mostly viewed at 16 pixels. Shrinking a 256px bitmap down to that size smears every edge together; rendering the vector at 16px lets the browser lay the shape onto the pixel grid directly.
That is what this page does — one render pass per size, all packed into a single .ico. Windows and browsers then pick whichever size they need.
three steps
How to convert SVG to ICO
01
Drop the SVG
Pick a .svg file — it stays on your device.
02
Choose sizes
Tick the sizes to include; each one is rendered separately.
03
Download
Save the .ico and drop it at the root of your site.