diff --git a/README.md b/README.md
index 71421d8..71ee5b7 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,27 @@ fsdecrypt ABCD_1.00.00_20240101120000_0.app ABCD_1.01.00_20240215143000_1_1.00.0
 
 The output folder is named after the input file (e.g. `ABCD_1.01.00_20240215143000_1_1.00.00/`).
 
+## Windows Right-Click Menu
+
+Two batch files add an **"Unpack with fsdecrypt"** entry (with an unpack icon)
+to the right-click menu of `.app` and `.opt` files:
+
+- **`install-context-menu.bat`** — install the menu entry
+- **`uninstall-context-menu.bat`** — remove it
+
+Just double-click `install-context-menu.bat`. No administrator rights are
+needed — it installs under the current user only (`HKCU`) and leaves the normal
+double-click association untouched. Right-clicking a file then runs the full
+extraction and keeps the console window open until you press a key.
+
+`install-context-menu.bat` finds `fsdecrypt.exe` automatically when run from the
+repo root (it looks in `target\release` then `target\debug`) or when placed next
+to the binary. The icon is taken from `assets\fsdecrypt.ico` (or `fsdecrypt.ico`
+beside the script). The menu stores the absolute path it found, so re-run it if
+you move the exe.
+
+> On Windows 11 the entry appears under **Show more options** (the classic menu).
+
 ## External Key Files
 
 For games not in the built-in key database, place a file named `{GAME_ID}.bin` in the working directory:
diff --git a/assets/fsdecrypt.ico b/assets/fsdecrypt.ico
new file mode 100644
index 0000000..1644b51
Binary files /dev/null and b/assets/fsdecrypt.ico differ
diff --git a/install-context-menu.bat b/install-context-menu.bat
new file mode 100644
index 0000000..2ad1300
--- /dev/null
+++ b/install-context-menu.bat
@@ -0,0 +1,48 @@
+@echo off
+setlocal enabledelayedexpansion
+rem ---------------------------------------------------------------------------
+rem  Adds an "Unpack with fsdecrypt" entry (with icon) to the right-click menu
+rem  of .app and .opt files. Per-user only (HKCU) -- no administrator needed,
+rem  and it does not change the normal double-click association.
+rem
+rem  Place this next to fsdecrypt.exe and run it, or run it from the repo root
+rem  after `cargo build --release`. Run uninstall-context-menu.bat to undo.
+rem ---------------------------------------------------------------------------
+
+rem --- locate fsdecrypt.exe --------------------------------------------------
+set "EXE="
+if exist "%~dp0fsdecrypt.exe"                set "EXE=%~dp0fsdecrypt.exe"
+if not defined EXE if exist "%~dp0target\release\fsdecrypt.exe" set "EXE=%~dp0target\release\fsdecrypt.exe"
+if not defined EXE if exist "%~dp0target\debug\fsdecrypt.exe"   set "EXE=%~dp0target\debug\fsdecrypt.exe"
+if not defined EXE (
+    echo ERROR: could not find fsdecrypt.exe next to this script or under target\.
+    echo        Build it first:  cargo build --release
+    pause
+    exit /b 1
+)
+
+rem --- locate the icon (optional) --------------------------------------------
+set "ICON="
+if exist "%~dp0fsdecrypt.ico"        set "ICON=%~dp0fsdecrypt.ico"
+if not defined ICON if exist "%~dp0assets\fsdecrypt.ico" set "ICON=%~dp0assets\fsdecrypt.ico"
+
+echo Using exe : !EXE!
+if defined ICON (echo Using icon: !ICON!) else (echo Using icon: ^(none found^))
+echo.
+
+call :install ".app"
+call :install ".opt"
+
+echo.
+echo Done. Right-click a .app or .opt file to see "Unpack with fsdecrypt".
+echo ^(On Windows 11 it is under "Show more options".^)
+pause
+exit /b 0
+
+:install
+set "KEY=HKCU\Software\Classes\SystemFileAssociations\%~1\shell\fsdecrypt"
+reg add "%KEY%" /ve /d "Unpack with fsdecrypt" /f >nul
+if defined ICON reg add "%KEY%" /v Icon /d "!ICON!" /f >nul
+reg add "%KEY%\command" /ve /d "cmd /c \"\"!EXE!\" \"%%1\" ^& pause\"" /f >nul
+echo   installed for %~1
+goto :eof
diff --git a/uninstall-context-menu.bat b/uninstall-context-menu.bat
new file mode 100644
index 0000000..05d006e
--- /dev/null
+++ b/uninstall-context-menu.bat
@@ -0,0 +1,13 @@
+@echo off
+setlocal
+rem ---------------------------------------------------------------------------
+rem  Removes the "Unpack with fsdecrypt" right-click entry installed by
+rem  install-context-menu.bat. Safe to run even if it was never installed.
+rem ---------------------------------------------------------------------------
+
+reg delete "HKCU\Software\Classes\SystemFileAssociations\.app\shell\fsdecrypt" /f >nul 2>&1
+reg delete "HKCU\Software\Classes\SystemFileAssociations\.opt\shell\fsdecrypt" /f >nul 2>&1
+
+echo Removed "Unpack with fsdecrypt" from the right-click menu of .app and .opt files.
+pause
+exit /b 0