Free online W64 to CAF converter

Source format: W64

W64 is an audio file format used by Sound Forge and other professional audio tools as a 64-bit RIFF/WAVE variant. It was designed to overcome the size limits of standard WAV files, making it useful for very large recordings, long-form audio capture, archiving, and high-resolution studio work. W64 files are most often encountered in audio production environments where long recording times or large multichannel files are common.

Target format: CAF

CAF stands for Core Audio Format, a flexible audio container developed by Apple. It is widely used on macOS and iOS systems and supports large files, high sample rates, multiple channels, and a variety of audio codecs. CAF is a good choice for professional audio workflows, especially when working with Apple software such as Logic Pro, GarageBand, and other Core Audio–based applications.

How to perform the conversion

The most reliable way to convert W64 to CAF is with a desktop audio editor or converter that supports both formats. A practical option is FFmpeg, which can read W64 and write CAF in many cases.

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt.
3. Run a command such as ffmpeg -i input.w64 -c:a pcm_s24le output.caf to convert the file while keeping it as uncompressed PCM audio. You can also use pcm_s16le or another supported PCM codec if needed.
4. Check the resulting CAF file in your target audio software to confirm that it opens correctly and that the sample rate, bit depth, and channel count are preserved.

If you prefer a graphical workflow, some audio editors can export to CAF directly after opening the W64 file. In such programs, the process is usually File → Open, then File → Export or Save As, and finally choosing CAF as the output format.

You can also convert the file on 101convert.com for free, without installing any software.

Notes on quality and compatibility

This conversion is usually lossless if you export to a PCM-based CAF codec such as PCM 16-bit or PCM 24-bit. However, the resulting file may be larger than compressed formats because CAF often stores uncompressed audio in professional workflows. Compatibility is generally excellent on Apple platforms, but support outside the Apple ecosystem can be more limited, so verify that your destination application can open CAF files before converting. If the source W64 contains unusual metadata or non-PCM audio, some tools may not preserve every tag or embedded attribute exactly.