CAF to MP4 Converter

CAF to MP4 Converter

CAF (Core Audio Format) is Apple's audio container, used by macOS and iOS apps for long or high-fidelity recordings. Because a CAF file holds only audio, this tool produces an audio-only MP4 — the sound is encoded as AAC and wrapped in an MP4 container, so it plays in QuickTime, Windows Media Player, browsers, and mobile devices that reject the original .caf. There is no video track; if you want the more conventional audio extension, an MP4 of audio is the same container as an M4A file.

CAF Format at a Glance

MP4 (Audio) Format at a Glance

How to Convert CAF to MP4

1. Upload Your CAF File: Drag and drop your .caf file onto the page or click "+ Add Files" to browse. You can queue several files and convert them in one batch.
2. Pick the Audio Codec: Open Advanced Options and set the Audio Codec to AAC — the standard codec for MP4 audio and the most widely supported. Other codecs such as AC3 or MP3 are available if a specific device requires them.
3. Set the Bitrate (Optional): Choose a target bitrate or quality preset; a higher bitrate keeps more detail at the cost of a larger file, while a lower one shrinks the result for sharing.
4. Convert and Download: Click "Convert" and download your MP4. No sign-up, no watermark.

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public.

Frequently Asked Questions

Will the MP4 contain video?

No. A CAF file holds only audio, so the resulting MP4 has a single AAC audio track and no video. It is the audio that becomes portable — the MP4 container simply makes that audio playable on devices that do not recognize the .caf extension.

Is an audio MP4 the same as an M4A file?

Effectively, yes. An MP4 that carries only AAC audio is the same container that Apple labels .m4a. The bytes inside are identical; the extension differs by convention. If you specifically need the .m4a name, use the CAF to M4A converter instead.

Will I lose quality converting CAF to MP4?

It depends on what the CAF held. If the source was uncompressed PCM or Apple Lossless, encoding to AAC is lossy and discards some data, though at higher bitrates the difference is hard to hear. If the CAF already contained AAC, re-encoding still adds a small generational loss; to avoid any loss, keep the audio in a lossless target such as CAF to WAV.

Why convert CAF if it has no 4 GB size limit?

CAF's 64-bit offsets let a single file hold enormous recordings, which is a strength for archiving on a Mac. The trade-off is portability: outside macOS and iOS, most players do not open .caf. Converting to an AAC-based MP4 keeps the file compact and playable almost everywhere.

Does the converter keep CAF metadata like markers and channel layout?

CAF can store markers, regions, and channel-layout chunks that the MP4 container does not represent the same way, so app-specific annotations are not guaranteed to carry over. The audio stream itself transfers; specialized Core Audio metadata generally does not.

How does CAF to MP4 quality compare to CAF to MP3?

In our testing, AAC in an MP4 tends to preserve high frequencies better than MP3 at the same bitrate, which is why MP4/AAC is the default here. If you need the broadest legacy-device support over fidelity, CAF to MP3 is the safer choice.

Is the converter free, and are my files private?

Yes. There is no sign-up, no watermark, and no file-count limit. Your CAF is uploaded over an encrypted connection, converted on our servers, and deleted automatically a few hours afterward — it is never shared or made public.