Several reputable tools offer a free version compatible with Windows 8.1 64-bit. These applications provide a user-friendly interface to manage your hotspot name (SSID), password, and connected devices. Mars WiFi - Free WiFi HotSpot - Download
Turning your Windows 8.1 64-bit PC or laptop into a Wi-Fi hotspot is a great way to share your internet connection with other devices like smartphones and tablets without needing a physical router. Because Windows 8.1 was released before "Mobile Hotspot" became a built-in feature in Windows 10, you typically need to use third-party software or specific command-line tricks to enable this functionality. Best Free WiFi Hotspot Software for Windows 8.1 (64-bit) free download wifi hotspot for windows 8.1 64 bit