Free online GBS to FLAC converter

A GBS file contains Game Boy music data rather than a ready-made recording, so audio editors and players that accept only FLAC cannot use it directly. Converting it renders a selected track to audio for editing, sharing, or lossless archiving.

What the GBS format is

GBS is a Game Boy music format used for game soundtrack rips. It stores song data and the code needed to play it through the Game Boy sound hardware, so playback software emulates that hardware. GBS files are commonly encountered in game-music collections; they are usually extracted from games rather than exported by audio recording software.

What the FLAC format is

FLAC is a compressed audio format that preserves the audio samples exactly. It is useful for archiving or editing rendered tracks when you want smaller files than uncompressed WAV without the quality loss of lossy formats.

How to convert GBS to FLAC

Online on 101convert.com

1. Upload the GBS file on the converter page. You can add several files for batch conversion; the per-file size limit is shown on the page.
2. Before converting, set the desired sample rate and channel count.
3. Start the conversion, then download the resulting FLAC file or files. The conversion runs on the server with FFmpeg.

Offline with desktop software

Use Game_Music_Emu’s gme2wav utility to render a track to WAV, then encode that recording with FFmpeg:

1. Run gme2wav input.gbs intermediate.wav.
2. Encode the rendered audio with ffmpeg -i intermediate.wav -c:a flac output.flac.

GBS files can contain multiple tracks, and their music may not specify a natural end. Select the intended track and set a suitable playback duration using the controls or options provided by your gme2wav build.

Quality and limitations

Conversion emulates Game Boy playback; it does not extract a pre-existing audio recording from the GBS file. FLAC preserves the rendered samples losslessly, but cannot make the emulation output more faithful than the selected emulator and its settings. Check the track and ending before keeping the file, since an incorrect selection or duration can produce the wrong song or a truncated recording.