Renaming Files
Last site update: 1 Sep 2025
Irfanview
Irfanview is an image viewer and editor but has built in batch renaming that works on any files, not just images.
- Open a file in Irfanview: press
o. - Use
bto open the batch rename dialogue box. - Click the
batch renameradio button (top left) - Press the
optionsbutton to choose your renaming parameters. - Use
$Nfor the original name. You can change strings of text to other strings.
Good for changing spaces in files to hyphens.
Changing capitals to lowercase was very hit and miss but a much better way is the following.
Changing to lowercase using Windows
With a command prompt you can type the following from inside the directory you wish to change the file names:
1for /f "Tokens=*" %f in ('dir /l/b/a-d') do (rename "%f" "%f")
Simple to use as above but see Superuser article for details on how this works.