Rename hundreds of files at once.

Why

Renaming one file is easy. Renaming four hundred holiday photos, or a folder of scans called Untitled 1 through Untitled 400, is an afternoon lost to the keyboard — or a Terminal command you'd rather not get wrong.

Nomen does it in steps you can see. Every name is previewed before anything touches the disk, and the changed characters are highlighted so you can check the pattern at a glance rather than reading four hundred lines.

Fifteen ways to change a name

• Find & replace
• Regular expressions
• Add text
• Remove text
• Remove characters
• Collapse spaces
• Crop by position
• Insert at position
• Change case
• Truncate
• Sequence numbers
• Roman numerals
• Letter sequences
• Date stamps
• Image dimensions
• Parent folder name

Steps run top to bottom, so “strip the camera prefix, lowercase it, then number them” is three steps and one preview.

Built to not lose your files

Installing

Nomen isn't code-signed yet, so macOS will block the first launch. Until it's notarized, here's the way around it:

1. Unzip and drag Nomen.app to your Applications folder.
2. Right-click the app and choose Open (double-clicking won't offer the bypass).
3. Click Open in the warning dialog. You only do this once.

If macOS still refuses, clear the quarantine flag:

xattr -dr com.apple.quarantine /Applications/Nomen.app