diff --git a/ZynqFlaster.spec b/ZynqFlaster.spec
new file mode 100644
index 0000000..3e13440
--- /dev/null
+++ b/ZynqFlaster.spec
@@ -0,0 +1,63 @@
+# -*- mode: python ; coding: utf-8 -*-
+"""PyInstaller spec for Zynq Flasher — Windows x64 single-exe build.
+
+Usage:
+    pyinstaller --clean --noconfirm ZynqFlaster.spec
+    → output: dist/ZynqFlaster.exe
+"""
+
+from PyInstaller.utils.hooks import collect_data_files, collect_submodules
+
+block_cipher = None
+
+a = Analysis(
+    ['app.py'],
+    pathex=['src'],
+    binaries=[],
+    datas=[
+        # CustomTkinter themes, fonts, icons — auto-collected
+        *collect_data_files('customtkinter'),
+        # Default config shipped as template
+        ('config/default_config.yaml', 'config'),
+    ],
+    hiddenimports=[
+        *collect_submodules('customtkinter'),
+        'darkdetect',
+        'yaml',
+        'serial',
+        'serial.tools',
+        'serial.tools.list_ports',
+    ],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=[],
+    win_no_prefer_redirects=False,
+    win_private_assemblies=False,
+    cipher=block_cipher,
+    noarchive=False,
+)
+
+pyz = PYZ(a.pure)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    a.binaries,
+    a.zipfiles,
+    a.datas,
+    [],
+    name='ZynqFlaster',
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=True,
+    upx_exclude=[],
+    runtime_tmpdir=None,
+    console=True,       # show console for terminal log output
+    disable_windowed_traceback=False,
+    argv_emulation=False,
+    target_arch=None,
+    codesign_identity=None,
+    entitlements_file=None,
+)
diff --git a/build_windows.bat b/build_windows.bat
new file mode 100644
index 0000000..c0bdc05
--- /dev/null
+++ b/build_windows.bat
@@ -0,0 +1,47 @@
+@echo off
+setlocal
+
+echo ============================================================
+echo   Zynq Flasher — Windows x64 Build Script
+echo ============================================================
+echo.
+
+REM ── 1. Check Python ─────────────────────────────────────────
+python --version >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [ERROR] Python not found. Install Python 3.9+ first.
+    pause
+    exit /b 1
+)
+echo [1/4] Python: OK
+
+REM ── 2. Install dependencies ─────────────────────────────────
+echo [2/4] Installing Python packages...
+pip install -r requirements.txt --quiet
+pip install pyinstaller --quiet
+echo        Done.
+
+REM ── 3. Clean previous builds ────────────────────────────────
+echo [3/4] Cleaning previous builds...
+if exist build rmdir /s /q build
+if exist dist\ZynqFlaster.exe del /q dist\ZynqFlaster.exe
+if not exist dist mkdir dist
+
+REM ── 4. Build ────────────────────────────────────────────────
+echo [4/4] Building ZynqFlaster.exe...
+pyinstaller --clean --noconfirm ZynqFlaster.spec
+
+echo.
+if exist dist\ZynqFlaster.exe (
+    echo ============================================================
+    echo   Build successful!
+    echo   Output: dist\ZynqFlaster.exe
+    echo ============================================================
+) else (
+    echo [ERROR] Build failed — dist\ZynqFlaster.exe not found.
+    pause
+    exit /b 1
+)
+
+endlocal
+pause