MassReplaceIt 4.0
The Ultimate Find and Replace Utility
Get MassReplaceIt

MassReplaceIt 4.0
For macOS 10.13 and later
Apple Silicon + Intel

Released April 17, 2026

MassReplaceIt 3.1.2
For Mac OS X 10.7 - 10.12

MassReplaceIt 2.9.1
For Mac OS X 10.3 - 10.6

New in Version 4.0
  • Apple Silicon support
  • View folder hierarchies in file lists
  • Organize saved searches into folders
  • New filter types
  • Improved alias support
  • Refreshed user interface

Full list

Key Features
  • Search file contents or filenames
  • Preview changes
  • Save and reuse searches
  • Exclude files based on filter criteria
  • Detailed search results
  • Regular expression support
  • Undo changes from previous searches
Donate

MassReplaceIt is free to use, but if you find it useful please consider a donation to support continued development.

MassReplaceIt makes bulk file changes easy. Remove unwanted text from filenames, replace text throughout a website, number your files and more.

Power

Make changes across many files at once, whether it's 10 or 10,000. Perform multiple search actions in the same search. Filter the files you're searching based on file attributes. For advanced users, regular expressions and macros allow for extra flexibility.

Convenience

Save your searches so that you can repeat them later or use them as the basis for a future search with the same actions, files or filters. Set your search as the default search so that it's ready whenever you open MassReplaceIt.

Peace of Mind

Not sure if your search is quite right? Preview changes before anything is changed. Choose which individual changes, files or entire folders to confirm.

Only realize later that something unexpected happened? MassReplaceIt can track changes in recent searches, so you can come back later to undo those changes provided you haven't since made other changes to the files.

Want to know more?

Tour the app or download MassReplaceIt.

Fantastic program, great flexibility with filename or contents replacing. It allows you to work out all features within seconds. 10 out of 10 from me.

Bob E