Free online AIF to W64 converter

Source format: AIF

AIF usually refers to Audio Interchange File Format (often seen as .aif or .aiff). It is an uncompressed audio format developed by Apple and widely used in professional audio production, editing, archiving, and sample libraries. Because it stores audio with little or no compression, AIF files preserve high quality but can be relatively large.

Common uses include music production, sound design, broadcast workflows, and transferring audio between editing systems. AIF is supported by many digital audio workstations and media players, especially on macOS and in professional audio environments.

Target format: W64

W64 is the Wave64 audio container format, developed by Sony. It is similar in purpose to WAV but uses 64-bit file size fields, which makes it suitable for very large audio files that exceed the size limits of standard WAV. W64 is mainly used in professional audio editing and mastering workflows where long recordings or high-resolution multichannel audio need to be stored reliably.

The main advantages of W64 are its support for large files, broad PCM audio compatibility, and suitability for archival or production use when standard WAV size limits are a concern. However, it is less universally supported than WAV, so it is most useful in specialized audio software.

How to perform the conversion

The most reliable way to convert AIF to W64 is with a desktop audio editor or command-line tool that supports both formats. A practical choice is FFmpeg, which can read AIF and write W64 without re-encoding if the audio codec is already compatible.

1. Install FFmpeg on your computer if it is not already available.
2. Open a terminal or command prompt in the folder containing your AIF file.
3. Run a command such as ffmpeg -i input.aif -c:a pcm_s16le output.w64 for standard 16-bit PCM audio.
4. If your source is 24-bit or 32-bit PCM, choose a matching PCM codec, for example ffmpeg -i input.aif -c:a pcm_s24le output.w64.
5. Check the resulting file in your audio editor or player to confirm that it opens correctly.

If you prefer a graphical workflow, use a professional audio editor that supports export to Wave64. Open the AIF file, then choose File → Export or File → Save As, and select Wave64 or W64 as the output format if available.

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

Notes on quality, compatibility, or limitations

AIF to W64 conversion is usually lossless if both formats use PCM audio and you keep the same sample rate, bit depth, and channel count. In that case, the conversion changes only the container, not the audio quality.

Compatibility is the main limitation. W64 is not as widely supported as WAV, so some media players and consumer audio tools may not open it. It is best suited for professional software such as audio editors, mastering tools, and archival systems.

If your AIF file contains compressed audio or unusual metadata, some tools may decode and rewrite the audio during conversion, which can affect metadata preservation. For best results, use software that explicitly supports direct PCM container conversion and verify the output in your target application.