Batch convert BMP to PNG
With this command line script you can batch convert all BMP-images to PNG. We will show you how to convert .BMP-files by right clicking on a folder. All the bmp-images will then be converted to png and saved in a sub folder (named ´png´). This tutorial will show you how to create a batch file with Irfanview command line commands and how to create a registry file to create an extra option in the context menu for converting bmp-files with one mouse click!
First, you have to download and install Irfanview (freeware) on your computer. Just choose the standard options, install paths etc.
1. Create a batch file (name it "convertbmp-png.bat") using notepad.
This is what the batch file should look like:
cd %1
md png
move /y *.png* png\
for %%n in (bmp) do "%ProgramFiles%\IrfanView\i_view32.exe" *.%%n /convert=*.png /silent %1
move /y *.png* png\ 2. Save this batch file as convertbmp-png.bat and copy it to the C:\Windows directory.
3. Create a .reg file (name it convertbmp-png.reg) using notepad.
This is what the reg-file should look like:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Folder\shell\convert_to_png]
@="Convert all bmp images to png"
[HKEY_CLASSES_ROOT\Folder\shell\convert_to_png\command]
@="C:\\WINDOWS\\convertbmp-png.bat \"%1\""
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\convert_to_png]
@="Convert all bmp images to png"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\convert_to_png\command]
@="C:\\WINDOWS\\convertbmp-png.bat \"%1\""4. Save the file as convertbmp-png.reg.
5. Double click the convertbmp-png.reg file to add the registry file to your Windows registry.
6. Now, when you right click a folder that contains bmp-files, the context menu will show an extra option: "Convert all bmp images to png". If you select this option, all the bmp-files will be converted to png and saved in a sub folder (named png).
