Free online VGZ to FLAC converter

A VGZ game-music file may need to become FLAC when a player, editor, or archive workflow accepts standard audio files but not VGM logs. Conversion renders the chip music as audio and saves that playback in a lossless FLAC file.

What the VGZ format is

VGZ is a gzip-compressed VGM (Video Game Music) file. A VGM file records sound-chip commands from a game rather than storing a conventional audio waveform; VGZ files are commonly found in video-game music collections. VGM logging tools can create VGM files, which tools such as VGMTool or gzip utilities can compress into VGZ.

What the FLAC format is

FLAC is a lossless audio format supported by many music players and audio editors. It compresses decoded audio without discarding audio data, making it useful for editing, playback, and archiving when a device or application cannot read VGZ.

How to convert VGZ to FLAC

Online on 101convert.com

1. Upload the VGZ file on the converter page. You can add several files for batch conversion; the page shows the per-file size limit.
2. Set the sample rate and channel count if needed, then start the conversion. The converter runs on the server with FFmpeg.
3. Download the resulting FLAC file or files.

Offline with desktop software

Use the free, open-source vgmstream command-line tool to decode the VGZ to WAV, then encode the WAV with FFmpeg. Command-line builds are available for Windows, macOS, and Linux.

1. Decode the file: vgmstream-cli -o decoded.wav input.vgz
2. Encode the decoded audio as FLAC: ffmpeg -i decoded.wav -c:a flac output.flac

Replace the example filenames with your own. Keep the WAV as an intermediate file until you have checked the FLAC playback.

Quality and limitations

FLAC encoding is lossless relative to the decoded audio, but the result is a rendering of the VGM chip commands, not a copy of the original game data or a recovery of an original recording. The playback depends on the decoder’s sound-chip emulation, and the rendered duration or looping may differ from how a game or music player handles the track. Sample-rate or channel changes can also affect the rendered output.