Mass Rename
Mass Rename is a macOS utility for batch renaming files and folders with reusable rules, live previews, and metadata-based naming tools.
What is Mass Rename?
Mass Rename is a native Mac utility for renaming large groups of files and folders quickly and consistently. It helps users clean up messy filenames, apply naming patterns, and organize batches of documents, photos, music files, and downloads without editing each item one by one. The app supports reusable renaming workflows, so you can combine actions such as find and replace, case changes, numbering, and custom formatting, then use those rules again later. It also provides a live preview before changes are applied, along with undo support for reversing a batch rename. For media libraries and scanned files, Mass Rename can use photo, music, and date metadata as part of the new name. Mass Rename is published by Gtrigonakis and is built for macOS.
Key features
- Batch rename files and folders in a single operation
- Build and save reusable renaming workflows for repeated jobs
- Preview old and new names live before applying changes
- Use find and replace with plain text or regular expressions
- Add prefixes, suffixes, sequence numbers, dates, and custom formatting
- Rename items using photo, music, and file date metadata
- Undo an entire rename batch if you need to revert changes
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Safe
This app works on files and folders you choose, so the main practical risk is accidental renaming if you apply a rule you did not intend. Its preview and undo features are normal safeguards for this kind of utility. Review the rename results before confirming, especially when working with large folders or naming rules based on metadata.
Recommendation: Keep Mass Rename if you regularly rename groups of files or rely on saved rename workflows. If you no longer use it, removing the app is usually fine, but you may lose saved renaming presets and any convenience it provides for organizing large file sets.
Common paths
/Applications/Mass Rename.app
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