This workflow lets you rename multiple files at once using the really really great Alfred App on OS X. For this purpose, it provides a file action. After choosing files you are guided through three phases:

Step by Step

1. You are ask to enter or choose a regular expression which should match parts of the input file. File endings are not renamed so your regex must not match a file name with its extension but only the name itself.
   • You can use a normal python regex.
2. You are ask to enter or choose a rename pattern (also a regular expression). Here you have the following options:
   • $0 matches the full input, i.e. if your file is named 'foo.jpg' $0 gives you 'foo'.
   • $1 to $n contain the regex matching groups, you have defined previously.
   • {n} contains a serial number which starts at 1.
   • {d} contains the current date in the format 'YYYY-MM-DD'.
   • You can add the following options in front of the normal pattern followed by a /:
     • c to capitalize every word
     • r(<from>,<to>) to replace every occurrence of <from> with <to>
     • Multiple options can be divided by / again.
3. After pressing enter again, Alfred shows you a list which gives you a preview of how the renaming will look.
4. Pressing enter again will rename all files according to your expressions.

Examples

The workflow presents a number of options for both matching and replacing patterns.