Bulk Renamer

What Bulk Renamer is

Bulk Renamer is a free, open-source desktop app for batch-renaming files in a selected folder. It runs on Linux, macOS, and Windows, and displays a live preview of each proposed filename before applying changes. Rename patterns can combine find and replace, prefixes or suffixes, sequential numbering, case conversion, and extension changes. Find and replace accepts plain text or regular expressions. The app loads files in the chosen folder but does not include subfolders. Before proceeding, it checks for duplicate destination names and names that already exist on disk; a conflict stops the batch. Undo reverses only the most recent successful batch, and that history is held in memory, so it disappears when the app closes. The app uses the MIT license and requires no account. Its maker notes that unsigned apps may show standard Gatekeeper or SmartScreen warnings on first launch until code signing is set up. Infinite Creation describes its free tools as serving people who create, validate, publish, and teach media.