Batch File Renamer

Walk through every subfolder of a folder you pick, and prefix every file inside with the subfolder's name. One pass, and a messy music or photo collection turns into a self-describing flat list.

What it does

Point Batch File Renamer at a top-level folder. It descends into every subfolder and renames every file inside by prepending the subfolder's name to the filename. The original filename is preserved — only the prefix is added.

Example

You have a folder called ELO containing:

01 KING OF THE UNIVERSE.MP3
02 BLUEBIRD IS DEAD.MP3
03 OH NO NOT SUSAN.MP3
04 NEW WORLD RISING.MP3
05 SHOWDOWN.MP3

After Batch File Renamer:

ELO - 01 KING OF THE UNIVERSE.MP3
ELO - 02 BLUEBIRD IS DEAD.MP3
ELO - 03 OH NO NOT SUSAN.MP3
ELO - 04 NEW WORLD RISING.MP3
ELO - 05 SHOWDOWN.MP3

Now if you flatten the collection into a single playlist folder, you still know which album each track belongs to.

Best for

• Music libraries imported from CDs with generic Track NN filenames
• Photo folders dumped from a camera with IMG_NNNN filenames
• Document archives where folder = project name
• Any nested directory tree where folder context matters more than filenames

System requirements

• Windows 7, 8, 10, 11
• A few MB of free RAM
• Under 1 MB of disk space