How to Convert FLAC to MP3 (Lossless to Lossy)

FLAC files offer perfect audio quality but don't play on all devices or in all apps. Converting to MP3 reduces file size by 70–80% and makes your music compatible everywhere.

Understanding What Happens

Converting FLAC to MP3 is a lossy operation — you are permanently discarding audio data. The FLAC quality does NOT transfer to the MP3; you are creating a compressed version. Always keep your FLAC originals before converting.

Method 1: Audacity (Free, Single Files)

1. Download Audacity (free, open-source)
2. Install the FFmpeg library for Audacity (required for MP3 export — download from the Audacity manual)
3. File → Import → Audio to open the FLAC
4. File → Export → Export as MP3
5. Set bitrate: 320 kbps for best quality, 192 kbps for balanced size/quality

Method 2: foobar2000 (Free, Batch Conversion for Windows)

1. Download and install foobar2000
2. Select all FLAC files in your library
3. Right-click → Convert → Quick Convert
4. Choose MP3 (LAME) and set bitrate (320 kbps recommended)
5. Choose output folder → Start conversion

Method 3: FFmpeg (Command Line, Batch)

ffmpeg -i input.flac -ab 320k output.mp3

For an entire directory (Windows PowerShell):

Get-ChildItem *.flac | ForEach-Object { ffmpeg -i $_.FullName -ab 320k "$($_.BaseName).mp3" }

Recommended Bitrate

• 320 kbps: Best quality, ~10 MB per 4-minute song — indistinguishable from FLAC in blind tests
• 256 kbps: Google/Apple streaming quality, excellent for most listeners
• 192 kbps: Good quality, suitable for portable devices

Important: Never Convert MP3 Back to FLAC

Converting MP3 → FLAC does not restore quality. It just puts a compressed audio stream in a larger container. Always convert from your original FLAC files.