Updated June 2026 · runs 100% in your browser
FLAC to MP3
Convert lossless FLAC audio to smaller MP3 on your device. No upload, no sign-up, no limits.
Drop FLAC files here
or click to choose
🔒 Processed on your device · 0 bytes uploaded
First file loads the converter engine (~25 MB) — cached after that.
How it works
ConvertCabin loads a local copy of FFmpeg in this browser tab and converts on your device — nothing is uploaded. The first file downloads the engine (~25 MB), then it's cached.
It stays free, unlimited and private, and works offline once loaded.
About FLAC to MP3
FLAC is lossless and large; MP3 is far smaller and universally supported.
Frequently asked questions
How do I use FLAC to MP3?
Drop FLAC files and download the MP3s.
Is my file uploaded?
No. It is converted on your device by a local copy of FFmpeg and never uploaded.
What is a FLAC file?
FLAC (Free Lossless Audio Codec) compresses audio with no quality loss, giving exact studio sound at about half the size of WAV. Audiophiles favor it, though it's larger than MP3.
What is an MP3 file?
MP3 is the most widely supported audio format. Its lossy compression shrinks audio to a fraction of the original size while keeping it perfectly listenable, which is why it became the standard for music.