Uses the native font of the operating system to get close to a native app feel.

<p class="system-font-stack">This text uses the system font.</p>

.system-font-stack {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu,
    Cantarell, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

Explanation

• The browser looks for each successive font, preferring the first one if possible, and falls back to the next if it cannot find the font (on the system or defined in CSS).

1. -apple-system is San Francisco, used on iOS and macOS (not Chrome however)
2. BlinkMacSystemFont is San Francisco, used on macOS Chrome
3. Segoe UI is used on Windows 10
4. Roboto is used on Android
5. Oxygen-Sans is used on Linux with KDE
6. Ubuntu is used on Ubuntu (all variants)
7. Cantarell is used on Linux with GNOME Shell
8. "Helvetica Neue" and Helvetica is used on macOS 10.10 and below (wrapped in quotes because it has a space)
9. Arial is a font widely supported by all operating systems
10. sans-serif is the fallback sans-serif font if none of the other fonts are supported

Browser support