diff --git a/start.bat b/start.bat
new file mode 100644
index 0000000..5a91fcd
--- /dev/null
+++ b/start.bat
@@ -0,0 +1,114 @@
+@echo off
+setlocal EnableExtensions
+
+rem Run from the script directory so relative paths match start.sh.
+cd /d "%~dp0" || exit /b 1
+
+rem Modern Windows terminals support ANSI escape sequences for colored logs.
+for /f %%e in ('echo prompt $E^| cmd') do set "ESC=%%e"
+set "GREEN=%ESC%[0;32m"
+set "BLUE=%ESC%[0;34m"
+set "YELLOW=%ESC%[1;33m"
+set "NC=%ESC%[0m"
+
+echo %BLUE%Starting MiniApp Sandbox services...%NC%
+echo.
+
+rem Resolve node.exe once so the background services do not depend on a shell shim.
+set "NODE_EXE="
+for /f "delims=" %%i in ('where node 2^>nul') do (
+    if not defined NODE_EXE set "NODE_EXE=%%i"
+)
+
+if not defined NODE_EXE (
+    echo %YELLOW%Node.js was not found on PATH.%NC%
+    goto :fail
+)
+
+rem Install root dependencies only when they are missing.
+if not exist "node_modules\" (
+    echo %YELLOW%Installing root dependencies...%NC%
+    call pnpm install
+    if errorlevel 1 goto :fail
+)
+
+rem Install notify dependencies and rebuild better-sqlite3 on first setup.
+if not exist "notify\node_modules\" (
+    echo %YELLOW%Installing notify dependencies...%NC%
+    pushd "notify" || goto :fail
+    call pnpm install
+    if errorlevel 1 (
+        popd
+        goto :fail
+    )
+
+    call pnpm rebuild better-sqlite3
+    if errorlevel 1 (
+        popd
+        goto :fail
+    )
+    popd
+)
+
+rem Replace any stale PID file with the new background process IDs.
+if exist ".pids" del ".pids" >nul 2>&1
+
+echo %GREEN%Starting notification service on port 3200...%NC%
+rem Use the underlying CLI directly because detached pnpm/Volta shims can exit on Windows.
+call :start_service "%cd%\notify" "..\notify.log" "%NODE_EXE%" "'node_modules\tsx\dist\cli.mjs' 'watch' 'src\index.ts'" NOTIFY_PID
+if errorlevel 1 goto :fail
+
+rem Match the Bash script's short pause before the sandbox starts.
+timeout /t 2 /nobreak >nul
+
+echo %GREEN%Starting sandbox on port 3100...%NC%
+call :start_service "%cd%" "sandbox.log" "%NODE_EXE%" "'node_modules\vite\bin\vite.js' '--port' '3100'" SANDBOX_PID
+if errorlevel 1 goto :fail
+
+> ".pids" echo %NOTIFY_PID%
+>> ".pids" echo %SANDBOX_PID%
+
+echo.
+echo %GREEN%[OK] Services started!%NC%
+echo.
+echo %BLUE%URLs:%NC%
+echo   Sandbox:      http://localhost:3100
+echo   Notification: http://localhost:3200
+echo.
+echo %BLUE%Logs:%NC%
+echo   Sandbox:      Get-Content sandbox.log -Wait
+echo   Notification: Get-Content notify.log -Wait
+echo.
+echo %YELLOW%To stop all services, run: .\stop.bat%NC%
+echo.
+rem Keep the window open when the script is launched directly from Explorer.
+pause
+exit /b 0
+
+:start_service
+setlocal
+
+rem Start each service in a hidden PowerShell process so all output can be redirected to one log.
+set "START_WORKDIR=%~1"
+set "START_LOG=%~2"
+set "START_EXE=%~3"
+set "START_ARGS=%~4"
+set "START_SCRIPT=& '%START_EXE%' %START_ARGS% *> '%START_LOG%'"
+set "PID="
+
+for /f %%i in ('powershell -NoProfile -Command "$wd = $env:START_WORKDIR; $script = $env:START_SCRIPT; $process = Start-Process -FilePath 'powershell.exe' -ArgumentList @('-NoProfile', '-Command', $script) -WorkingDirectory $wd -WindowStyle Hidden -PassThru; $process.Id"') do (
+    set "PID=%%i"
+)
+
+if not defined PID (
+    endlocal & exit /b 1
+)
+
+endlocal & set "%~5=%PID%"
+exit /b 0
+
+:fail
+echo.
+echo %YELLOW%Startup failed. Check the command output above for details.%NC%
+pause
+exit /b 1
diff --git a/stop.bat b/stop.bat
new file mode 100644
index 0000000..8c35375
--- /dev/null
+++ b/stop.bat
@@ -0,0 +1,43 @@
+@echo off
+setlocal EnableExtensions
+
+rem Run from the script directory so the PID file is always resolved correctly.
+cd /d "%~dp0" || exit /b 1
+
+rem Keep the Windows output style aligned with stop.sh.
+for /f %%e in ('echo prompt $E^| cmd') do set "ESC=%%e"
+set "RED=%ESC%[0;31m"
+set "GREEN=%ESC%[0;32m"
+set "NC=%ESC%[0m"
+
+echo %RED%Stopping MiniApp Sandbox services...%NC%
+echo.
+
+if not exist ".pids" goto :no_pids
+
+for /f "usebackq delims=" %%p in (".pids") do call :stop_pid %%p
+
+del ".pids" >nul 2>&1
+
+echo.
+echo %GREEN%[OK] All services stopped%NC%
+echo.
+rem Keep the window open when the script is launched directly from Explorer.
+pause
+exit /b 0
+
+:no_pids
+echo %RED%No running services found (.pids file missing)%NC%
+echo.
+pause
+exit /b 0
+
+:stop_pid
+if "%~1"=="" exit /b 0
+
+tasklist /FI "PID eq %~1" | find "%~1" >nul
+if errorlevel 1 exit /b 0
+
+echo Stopping process %~1 and its children...
+taskkill /PID %~1 /T /F >nul 2>&1
+exit /b 0