What is a .CAF file?
CAF is Apple’s Core Audio Format, able to hold very large audio files. iMessage voice messages are saved as CAF. Created by Apple.
- Did you know
- CAF lifts the size limits of WAV and AIFF for long, high-resolution recordings.
- Core Audio Format was introduced by Apple in Mac OS X Tiger and uses 64-bit offsets throughout, so a single file can in theory exceed nine exabytes.
- A CAF file is built as a sequence of variable-length chunks in big-endian order, with a header that names the format and its version.
- What Analyser shows you
- Inspect the waveform, spectrogram, codec, bitrate, channels, and tags of MP3, WAV, FLAC, M4A, AAC, OGG, and Opus audio, and play Apple Core Audio (CAF) files such as iMessage voice messages, decoded on-device with FFmpeg where the browser cannot.
- Open a .CAF file
- Drag a .CAF file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.