Free online FLAC to W64 converter

Source format: FLAC

FLAC stands for Free Lossless Audio Codec. It is a widely used audio format for storing music and other recordings without losing quality during compression. FLAC is popular with audiophiles, music collectors, archivists, podcasters, and anyone who wants smaller files than WAV while keeping the original audio data intact. Typical uses include music libraries, archival masters, and distribution of high-quality audio.

Target format: W64

W64 is the Wave64 audio container format, developed by Sony as an extension of WAV for very large files. Its main advantage is support for files larger than the 4 GB limit of classic WAV, while still storing uncompressed PCM audio and metadata in a professional-friendly container. W64 is commonly used in audio production, post-production, and archival workflows where long recordings or high-resolution audio may exceed standard WAV limits.

How to perform the conversion

The most practical way to convert FLAC to W64 is with a desktop audio editor or converter that can decode FLAC and export Wave64. A reliable option is FFmpeg, which is widely available on Windows, macOS, and Linux.

1. Install FFmpeg if it is not already available on your system.
2. Open a terminal or command prompt in the folder containing your FLAC file.
3. Run a command such as ffmpeg -i input.flac -c:a pcm_s24le output.w64.
4. If you need 16-bit PCM instead, use ffmpeg -i input.flac -c:a pcm_s16le output.w64.
5. Check the resulting file in an audio player or editor that supports W64.

If you prefer a graphical workflow, use an audio editor such as Audacity or Adobe Audition if it supports Wave64 export in your version. The general workflow is: open the FLAC file, then choose File → Export or File → Save As, select Wave64 or W64 as the output format, and save the file.

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

Notes on quality and compatibility

FLAC is lossless, so converting it to W64 does not improve audio quality; it only changes the container and codec. Because W64 typically stores uncompressed PCM, the output file will usually be much larger than the FLAC source. This conversion is useful when you need a professional editing format or compatibility with software that prefers Wave64 over compressed audio.

Keep in mind that some programs label Wave64 as W64, Wave64, or Sony Wave64. Also, not every audio player or editor supports W64, so verify compatibility with your target software before converting. If your goal is long-term storage and smaller size, FLAC is usually better; if your goal is editing or interchange with large PCM files, W64 is a good choice.