Unreal Engine PAK File Extractor

UnrealEnginePakFileExtractor.bat

@echo off
echo ========================================
echo    Unreal Engine PAK File Extractor
echo ========================================
echo.

REM ========================================
REM    EDITABLE CONFIGURATION VALUES
REM ========================================
REM Unreal Engine Installation Path (change this to your UE installation path)
set "UE_INSTALL_PATH=D:\Program Files\Epic Games\UE_EDITHERE"

REM PAK File Location (change this to your PAK file path)
set "PAK_FILE=C:\EDITHERE\Content\Paks\EDITHERE-Windows.pak"

REM UCAS File Location (change this to your UCAS file path)
set "UCAS_FILE=C:\EDITHERE\Content\Paks\EDITHERE-Windows.ucas"

REM Extract Folder Location (change this to where you want to extract)
set "EXTRACT_FOLDER=C:\Users\EDITHERE\Desktop\UnrealEnginePakFile_Extracted"

REM ========================================
REM    AUTO-CONFIGURED PATHS
REM ========================================
set "UNREALPAK_PATH="

REM Try to find UnrealPak.exe using configured path
set "UNREALPAK_PATH=%UE_INSTALL_PATH%\Engine\Binaries\Win64\UnrealPak.exe"

if exist "%UNREALPAK_PATH%" (
    echo Found UnrealPak.exe at: %UNREALPAK_PATH%
) else (
    echo ERROR: UnrealPak.exe not found!
    echo.
    echo Searched location:
    echo   %UNREALPAK_PATH%
    echo.
    echo Please check your UE_INSTALL_PATH setting.
    echo Current setting:
    echo   UE_INSTALL_PATH = %UE_INSTALL_PATH%
    echo.
    pause
    exit /b 1
)

echo.
echo Using UnrealPak.exe: %UNREALPAK_PATH%
echo.

REM Create extract folder
if not exist "%EXTRACT_FOLDER%" (
    mkdir "%EXTRACT_FOLDER%"
    echo Created extract folder: %EXTRACT_FOLDER%
)

echo.
echo ========================================
echo    Configuration Summary
echo ========================================
echo UE Install Path: %UE_INSTALL_PATH%
echo PAK File: %PAK_FILE%
echo UCAS File: %UCAS_FILE%
echo Extract Folder: %EXTRACT_FOLDER%
echo.
echo ========================================
echo    Extracting PAK Files...
echo ========================================
echo.

REM Extract PAK file
echo Extracting PAK file...
echo Trying without encryption key first...
"%UNREALPAK_PATH%" "%PAK_FILE%" -Extract "%EXTRACT_FOLDER%" -nocompress

if %ERRORLEVEL% NEQ 0 (
    echo.
    echo Trying with encryption key...
    "%UNREALPAK_PATH%" "%PAK_FILE%" -Extract "%EXTRACT_FOLDER%" -cryptokeys="C:\EDITHERE\Config\DefaultCrypto.ini"
)

if %ERRORLEVEL% EQU 0 (
    echo.
    echo ========================================
    echo    Extraction Completed Successfully!
    echo ========================================
    echo.
    echo Extracted to: %EXTRACT_FOLDER%
    echo.
    
    REM Show extracted file sizes
    echo File sizes in extracted folder:
    echo ================================
    for /f "tokens=3" %%a in ('dir "%EXTRACT_FOLDER%" /s /-c ^| find "File(s)"') do echo Total extracted size: %%a bytes
    echo.
    
    REM Show largest files
    echo Largest files in extracted folder:
    echo ==================================
    dir "%EXTRACT_FOLDER%" /s /-c | findstr /v "Directory" | sort /r | more
    echo.
    
) else (
    echo.
    echo ========================================
    echo    Extraction Failed!
    echo ========================================
    echo.
    echo Error code: %ERRORLEVEL%
    echo.
)

echo.
echo Press any key to open extract folder...
pause >nul

REM Open extract folder
explorer "%EXTRACT_FOLDER%"

echo.
echo Done!
pause