Free online W64 to AIFF converter

Source format

W64 is a Wave64 audio file format developed by Sony as an extension of standard WAV. It is used mainly in professional audio workflows where very large recordings are common, because it removes the 4 GB size limit of classic WAV files. W64 files are typically created by audio editors, recorders, and DAWs that need to store long multichannel sessions or high-resolution audio.

Target format

AIFF is Apple’s Audio Interchange File Format, a widely supported uncompressed audio format used in music production, editing, and archival storage. Its main advantages are broad compatibility with Apple software and many professional audio tools, plus lossless storage when used with PCM audio. AIFF is commonly chosen for exchanging mastered audio, samples, and project assets.

How to perform the conversion

The most reliable way to convert W64 to AIFF is with a desktop audio tool that supports both formats, such as FFmpeg or Audacity. If you want a quick browser-based option, you can convert the file on 101convert.com for free without installing any software.

Using FFmpeg

1. Install FFmpeg on your computer.
2. Open a terminal or command prompt in the folder containing the W64 file.
3. Run a command like ffmpeg -i input.w64 output.aiff.
4. Check the output file in an audio player or editor.

If you want to preserve the original PCM audio without re-encoding to a different lossy codec, FFmpeg will usually copy the audio into AIFF-compatible PCM automatically when the source is already uncompressed. If needed, you can explicitly set the sample format and channels during conversion.

Using Audacity

1. Open the W64 file in Audacity.
2. Confirm that the audio imports correctly.
3. Choose File → Export → Export as AIFF.
4. Select the desired quality settings and save the file.

Using professional DAWs

Many digital audio workstations can open W64 files and export AIFF directly. The exact menu names vary, but the workflow is usually File → Export or File → Bounce, then selecting AIFF as the output format.

Notes on quality, compatibility, or limitations

W64 to AIFF is usually a lossless conversion if the source audio is uncompressed PCM, because both formats can store audio without quality loss. However, AIFF has its own size and compatibility considerations: some software handles very large AIFF files less gracefully than W64, and older tools may not support all channel counts or sample formats equally well.

Also note that metadata support can differ between the two formats. Track names, markers, and other project data may not transfer perfectly, depending on the software used. If your W64 file contains non-PCM audio or unusual broadcast metadata, verify the result after conversion.

For best results, use a trusted desktop converter and confirm that the exported AIFF opens correctly in your target editor or player.