Going MP3 to FLAC is lossless from here on: no extra quality is lost, and FLAC keeps the file far smaller than WAV. Lost MP3 detail stays lost, though.
About MP3
The most popular lossy format
MP3 is a lossy audio format that greatly reduces file size while keeping near-CD perceived quality. It is supported by virtually every device and player, making it the top choice for sharing.
- Small file size, easy to share
- Universally supported by devices
- Lossy compression cannot restore lost audio
About FLAC
Lossless compressed format
FLAC uses lossless compression, cutting file size roughly in half while keeping the original audio quality. It is widely used by audiophiles and for archiving.
- Lossless, identical to the source
- Much smaller than WAV
- Some older players lack support
MP3 to FLAC FAQ
Will converting MP3 to FLAC lose quality?
MP3 is already a lossy format, so converting to lossless FLAC introduces no additional quality loss — existing compression artifacts remain but nothing new is degraded.
Will the file size change after conversion?
Converting to a lossless format (WAV) usually increases size, while converting to a lossy format (MP3, AAC) usually decreases it, depending on the chosen bitrate and sample rate.
How do I batch convert MP3 to FLAC?
Just drop multiple MP3 files in; they are converted to FLAC one by one via a queue. You can download them individually or as a single ZIP.