MP3 to FLAC Converter
Convert MP3 audio into a lossless FLAC container — for tools and workflows that require FLAC input. Free, in your browser, no signup.
Drag & drop your MP3 file here, or browse
Need your MP3 as a FLAC file? This free converter wraps .mp3 audio in a lossless FLAC container in seconds — no software or signup. Files up to 30MB are converted directly and nothing is stored after your download.
How to Convert MP3 to FLAC
1. Upload your MP3 file
Drag a file onto the box above, or click to browse.
2. FLAC is selected
FLAC is lossless, so there's no bitrate to choose — the quality setting doesn't apply.
3. Convert & download
Click Convert & Download. Your FLAC file downloads automatically.
The Honest Note: Lossless Container, Not Lossless Quality
This is important. MP3 is lossy — it already threw away audio data. Converting it to FLAC makes a lossless container around that already-lossy audio: a bigger file that sounds exactly like the MP3. It cannot restore quality the MP3 discarded, and it won't sound better than the original MP3. Do this only when a device or workflow specifically needs FLAC as input — not to "upgrade" an MP3. For genuine lossless, start from a lossless source. See is MP3 lossless? and MP3 vs FLAC. Need the reverse? Use FLAC to MP3.
Frequently Asked Questions
How do I convert MP3 to FLAC?
Upload your .mp3 file, keep FLAC selected, then click Convert & Download. The FLAC file is created and downloaded automatically.
Does converting MP3 to FLAC improve quality?
No. It wraps the already-lossy MP3 audio in a lossless container — a bigger file that sounds the same. It can't restore what the MP3 discarded.
Why would I convert MP3 to FLAC?
Only when a device, editor, or workflow specifically requires FLAC input. It avoids format-compatibility issues, but adds no quality.
Is the MP3 to FLAC converter free?
Yes — it's completely free, with no account, no watermarks, and no limit on how many files you convert.