Play Fortnite at xbox.com/play with Xbox Cloud Gaming for free

Now you can play Fortnite at xbox.com/play with Cloud Gaming for free. Just sign in to play with the Microsoft account you already have via browser on iOS, iPadOS, Android phones and tablets, or Windows PC. No install or membership required. Plus, you can use touch controls or a supported controller. *

*Requires a Microsoft account with Xbox profile. Xbox Cloud Gaming (beta) with Fortnite may require supported Bluetooth controller (sold separately). Select regions, devices, and browsers. Streaming limitations apply; server availability and wait times vary. Requires internet, ISP fees apply. Fortnite contains optional in-game purchases.

Source: XBOX YouTube