Inter UI, a typeface designed for user interfaces
If you're looking for a UI font that's non-specific to your design (ie. you're not designing a poster) then I recommend the following:font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";Everything else is less user friendly. This loads instantly, looks perfect on the user's screen, and is guaranteed to look exactly as it's supposed to.