Favicon is configured with the nuxt.config.js . Best file format is svg but the library can digest ico, png and jpeg too.
Default setup will generate ico and svg favicons and app icon for the mobile and browser toolbars.
scseComponents: {
...
favicon: 'public/iiasa_favicon_green.svg',
...
}
Favicon file must be at the root of the public folder
More detailed documentation can be found on the Nuxt SEO page .