Image Library Renamer

A free, open-source photo organizer for cleaning up large image libraries before importing them into Lightroom, Photos, or any other professional photo workflow. Written in C# (.NET / WinForms), it runs cross-platform on Windows and OS X (via Mono).

Image Library Renamer batch-renames photo folders using EXIF capture dates and file timestamps, so thousands of inconsistently named folders end up sorted and dated correctly — no manual file organization required. It's especially useful when migrating a Picasa photo library to Lightroom or another DAM tool.

Safe to run repeatedly on the same folders: each tool detects folders that have already been renamed or dated and skips them.

Features

• Folder Renamer — batch-renames image folders based on the oldest EXIF capture date found in each folder, falling back to file creation/modified/accessed dates when no EXIF data is present. Supports recursive folder scanning, skipping already-dated or numeric folder names, and a preview/test mode that logs planned renames without touching the filesystem.
• Picasa Embedder — reads dates out of legacy .picasa.ini files and applies them as file creation dates, so metadata isn't lost when leaving Picasa.
• Folder Name Parser — reads a date already present in a folder name and applies it to the creation/modified dates of the files inside, correcting file timestamps that drifted from the folder's actual date.

Recommended order when migrating a library to Lightroom: Picasa Embedder → Folder Renamer → Folder Name Parser.

Screenshots

Works on OS X too (via Mono):

Installation

Windows

1. Open ImageLibraryRenamer.sln in Visual Studio.
2. Build the ImageLibraryRenamer project (targets .NET Framework 4.0, WinForms).
3. Run the resulting ImageLibraryRenamer.exe.

OS X / Linux (via Mono)

1. Install Mono.
2. Build with xbuild ImageLibraryRenamer.sln (or open the solution in MonoDevelop/Visual Studio for Mac).
3. Run with mono ImageLibraryRenamer.exe.

Usage

1. Launch the app — it defaults to your Pictures folder, or pick a different image library folder.
2. Choose a tab: Folder Renamer, Picasa Embedder, or Folder Name Parser.
3. Configure options (recursive scan, EXIF vs. file date, skip patterns, preview/test mode) and click the corresponding action button.
4. Review the log output, then confirm the batch rename/update when prompted.

Always run with Preview checked first on an important library, and back up your files before doing bulk renames.

License

MIT — © David Veksler