Bulk Renamer vs ExifRenamer

Bulk Renamer is a free desktop app for batch-renaming files in a chosen folder, available for Linux, macOS, and Windows. It displays a live preview of each proposed filename before applying the batch. 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 from the selected folder but does not include subfolders. Before a batch runs, it checks whether destination names duplicate one another or already exist on disk, and a conflict blocks the operation. Undo reverses the latest successful batch only. That history is kept in memory and does not remain after the app closes. Bulk Renamer is open-source under the MIT license and its free plan costs nothing, with no account required. The maker notes that an unsigned app may trigger 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.

ExifRenamer is a free macOS app that renames photos, movie clips and audio clips from embedded date and time information. Its suggested YYYY-MM-DD_hh-mm-ss pattern gives filenames chronological order in Finder. Users can drag files onto the app icon or configure it as an automatic task in Apple Image Capture. A preview appears before renaming, with controls for naming styles, prefixes, suffixes, time-difference correction and sequence counters. The app can create a destination folder, move renamed files there and forward them to other applications. Listed formats include JPEG, TIFF, MOV, MP4, M4V, AVI, AIFF, AIF, WAV, MRW, NEF, CRW, CR2 and THM, with camera support including Casio, Olympus and Canon. ExifRenamer changes only filenames, not file contents. Some cameras may omit the required date and time metadata in supported formats, so extraction can fail. The page lists version 2.4.0 (15) and compatibility with macOS Sequoia. The plan is free, with optional donations.