Skip to content

Free browser tools that respect your files — everything runs locally, nothing is uploaded.

AIFF to CAF Converter

Convert AIFF files to CAF format online for free. No installation or registration required.

Quick Answer: How to Convert AIFF to CAF

AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV. CAF is Apple's Core Audio Format, a modern container without the 4 GB ceiling of older formats. Converting between them re-encodes the media with CAF's compression model, so output quality depends on the settings you pick in the converter. Run it free at practicalwebtools.com/convert/audio/aiff-to-caf: drop in your AIFF, adjust settings if you like, and download the CAF — no signup, no upload, everything stays on your device.

AIFF vs CAF: Which One and Why

AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV, designed by Apple in 1988 from Electronic Arts' IFF standard. CAF is Apple's Core Audio Format, a modern container without the 4 GB ceiling of older formats, introduced by Apple in 2005 with Core Audio. People reach for AIFF mainly for professional music production on macOS, DJ software libraries, sample packs, while CAF is the usual choice for iOS/macOS system sounds, Logic Pro and Final Cut intermediates. AIFF's headline strength: bit-perfect quality. CAF's: no practical file-size limit. On the other side of the ledger, AIFF limitation: same huge file sizes as WAV — and CAF limitation: little support outside the Apple ecosystem.

How to Convert AIFF to CAF Online

  1. 1

    Add your AIFF file: Drag and drop it into the converter, or click to browse. AIFF files up to the size limit are accepted, and nothing is uploaded — processing runs locally in your browser.

  2. 2

    Set CAF options: Pick your quality: the converter exposes the settings that matter for CAF. Higher bitrates preserve more of the AIFF's detail at larger file sizes.

  3. 3

    Download the CAF: Conversion runs on your device. When it completes, download the CAF file — repeat for as many files as you need, free and unlimited.

Key Facts

  • AIFF: designed by Apple in 1988 from Electronic Arts' IFF standard, uncompressed PCM — same size as WAV at equal settings.
  • CAF: introduced by Apple in 2005 with Core Audio, container — holds PCM, AAC, ALAC, MP3, or any Core Audio codec.
  • AIFF strength: bit-perfect quality.
  • CAF strength: no practical file-size limit.
  • AIFF limitation to know: same huge file sizes as WAV.
  • CAF limitation to know: little support outside the Apple ecosystem.
  • Under the hood: CAF is one of the few formats that can store audio chunks out of order — useful for editing apps that append data while recording

Format Background

AIFF

AIFF — designed by Apple in 1988 from Electronic Arts' IFF standard. AIFF-C (compressed AIFF, the .aifc extension) can hold IMA/SDX2 codecs — rare today, but why some .aifc files are far smaller than expected

CAF

CAF — introduced by Apple in 2005 with Core Audio. CAF is one of the few formats that can store audio chunks out of order — useful for editing apps that append data while recording

Frequently Asked Questions

Will converting AIFF to CAF lose quality?

It depends on the formats: AIFF is uncompressed PCM — same size as WAV at equal settings and CAF is container — holds PCM, AAC, ALAC, MP3, or any Core Audio codec. Any step from a lossless source into CAF keeps everything; any lossy step re-encodes and discards some data.

Are my files uploaded anywhere during AIFF → CAF conversion?

No. This converter runs on WebAssembly inside your browser — your AIFF file is read from disk, processed by your device's CPU, and the CAF is written back locally. There is no server upload at any point, which also means no size-based throttling or waiting in queue.

What CAF settings should I choose?

For iOS/macOS system sounds, start with the converter's default preset — it's tuned for the common case. If you need smaller files, step quality down gradually and listen or look at the result before batch-converting everything.

Why is my CAF file larger/smaller than the AIFF original?

CAF is container — holds PCM, AAC, ALAC, MP3, or any Core Audio codec, while AIFF is uncompressed PCM — same size as WAV at equal settings. File size follows from that: moving to a less aggressive or lossless target grows the file; moving to efficient lossy compression shrinks it. CAF is one of the few formats that can store audio chunks out of order — useful for editing apps that append data while recording

Related Converters

AIFF to MP3AIFF to WAVAIFF to OGGAIFF to AACMP3 to CAFWAV to CAFOGG to CAFAAC to CAF

Further reading

Guides and explainers on the Practical Web Tools blog cover audio and video formats in depth — or browse every audio converters pair from the hub.