Convert MP3 to CAF on Mac.
Local file processing, by renaming the file in Finder. No converter window and no upload queue.
Finder rename
report.mp3report.caf
How the rename works
- 1
Start with report.mp3
Put the MP3 file in a folder RenameTo watches, such as Desktop or Downloads.
- 2
Rename it to report.caf
In Finder, change .mp3 to .caf, then press Return. The rename is the command.
- 3
Find the CAF beside it
RenameTo produces the requested output and keeps a restorable backup of the original.
What happens under the hood
RenameTo reads the MP3 with the appropriate local macOS media or document framework, then writes a new CAF beside it. The file itself is not sent to a conversion server.
About the formats
MP3 is the audio format supported by almost every player. CAF is Apple's Core Audio format.
Questions, answered
Does my file get uploaded anywhere?
No. File processing happens on your Mac. RenameTo does use the network for license validation, trial activation, and update checks, but your source files are not part of those requests.
What happens to the original MP3 file?
RenameTo keeps a backup before processing. Undo restores the original alongside a format-changing output and does not delete that output. If the original name is already occupied, the restored copy gets “(restored)” in its name.
Can I convert a whole folder?
Yes. Rename multiple selected files in Finder and RenameTo queues each supported conversion, with a separate result and backup for every file.
Can I run the same conversion from a script?
Yes. The CLI command is: renameto caf *.mp3
Related conversions
Convert MP3 to AAC
report.mp3 → report.aac
Convert MP3 to AC3
report.mp3 → report.ac3
Convert MP3 to AIFF
report.mp3 → report.aiff
Convert MP3 to EAC3
report.mp3 → report.eac3
Convert 3GP to CAF
report.3gp → report.caf
Convert AAC to CAF
report.aac → report.caf
Convert AC3 to CAF
report.ac3 → report.caf
Convert AIFF to CAF
report.aiff → report.caf
Looking for another format? Browse every conversion.