batch convert all .webp files to png

@echo off
SETLOCAL
echo =====================================================
echo Convert .WEBP files to .PNG using Googles dwebp
echo rob@stempnet.com
echo =====================================================
echo.
set dwebpurl=https://developers.google.com/speed/webp/docs/precompiled
where dwebp /Q
if "%errorlevel%" NEQ "0" echo dwebp.exe NOT FOUND --- download from %dwebpurl% & exit /b 2


for /d %%d in (*) do call :cnv "%%d"
goto :end

:cnv
rem Convert
rem ==============================================
SETLOCAL
set dirPath=%~1
echo Processing folder "%dirPath%"........
if NOT exist "%dirPath%\*.webp" exit /b 0
pushd "%dirPath%"
REM ---- convert ONLY if no .png version exists ------
for %%a in (*.webp) do IF NOT EXIST "%%~na.png" dwebp %%a -o %%~na.png
popd
echo Processed "%dirPath%" completed!!!
ENDLOCAL
exit /b %errorlevel%



:end
pause
ENDLOCAL
echo.
echo Conversion Completed!!
echo.