SpoofGUI v1.0.4

Fifth release of the Windows client built on SNI-Spoofing. This is the big one: the SNI-Spoof engine is now pure C# running in-process — no Python, no separate engine process — plus a real system tray, a kill switch, live connections, profile backup, and in-app updates.

What's New:

• Pure-C# SNI engine (no Python) — the WinDivert wrong_seq capture/inject + fake-ClientHello core is now native C# (in-process P/Invoke), ported from patterniha/SNI-Spoofing. No PyInstaller, no engine .exe, smaller download, faster start. Resilient relay + Fast mode are kept.
• System tray — closing the window minimizes to the tray (engines keep running). A designed flyout shows live status/stats, a profile switcher, and quick connect/disconnect for the SNI engine and V2Ray without opening the window. Quit from the tray stops everything
• Kill switch (Settings) — if a connected core drops unexpectedly, all outbound traffic is blocked until you disconnect — no leaks. Cleared automatically on disconnect/exit
• Live Connections page — real-time TCP sessions on the SNI listener and the local proxy ports
• Profile backup — export/import all SNI profiles and V2Ray configs as a single JSON file (Settings → Backup)
• In-app updates — check the releases channel and download & install the matching Setup straight from Settings
• Built-in Cloudflare scan list — the SNI Scanner can scan a bundled ~640-host Cloudflare candidate list (from therealaleph/sni-spoofing-rust) and/or your saved Configs profiles, and auto-pick the lowest-latency result straight into the active profile
• Faster ping — parallel, fewer probes and shorter timeouts (v2rayN-class speed); pings now persist across page navigation and there's a cancel button to stop a run

Features:

• Bundled, ready-to-use; self-contained Windows build (no .NET / Xray / sing-box / Windows App Runtime install needed)
• Pure-C# in-process SNI-Spoof core with Fast mode (low latency)
• X-Ray Core support (Proxy & System Proxy)
• sing-box Core support (TUN Mode) with DNS control + LAN bypass
• System tray with live status, profile switcher, and quick connect
• Kill switch + Live Connections page
• SNI Scanner — pasted hosts, saved profiles, and a bundled Cloudflare list; auto-pick best
• Up to 100 SNI profiles; profile backup/restore (JSON)
• Real-delay (ping) testing — single & all configs, parallel, cancelable
• Multi-config import + multi-select delete + export
• LAN sharing
• Dark/Light mode
• Configurable Proxy / System Proxy ports & DNS
• In-app update check + install
• Minimal, control-panel design
• Total connection count + speed & total upload/download display

if you faced any error or bug, feel free to open an issue on the repository!