Convert M4A to FLAC
Convert M4A to FLAC right in your browser — free, private, nothing is uploaded. Get a lossless file any editor opens — no further quality loss.
Convert M4A to FLAC →Free · Private — runs in your browser, nothing is uploaded
M4A wraps AAC audio in an MPEG-4 container — the format iTunes and Apple Music use. AAC squeezes better quality than MP3 out of the same bitrate, at the cost of slightly narrower support.
FLAC compresses audio without losing anything — a perfect, bit-for-bit copy at a fraction of the WAV size, which makes it the default choice for archiving music.
Converting M4A to FLAC is about compatibility rather than quality: some editors, DAWs and pipelines simply insist on FLAC. You get a file they open natively — but the audio can never get better than the M4A you start from.
M4A vs FLAC
| M4A | FLAC | |
|---|---|---|
| Compression | lossy — some detail traded for size | lossless — nothing discarded |
| Codec / container | AAC audio in an MPEG-4 container | Free Lossless Audio Codec |
| Typical file size | small — like MP3, often better quality per byte | medium — typically 50–70% of the equivalent WAV |
| Best for | Apple devices and small high-quality files | archiving and lossless music libraries |
| Strength | better quality than MP3 at the same bitrate | lossless and compressed — a perfect copy, smaller than WAV |
| Watch out for | slightly less universal than MP3 | much larger than lossy formats; some older hardware skips it |
| Compatibility | excellent on Apple devices; broad elsewhere | wide in modern software; patchy on older hardware players |
How the conversion works
- Choose your M4A file (up to 10 MiB). The button above opens the converter with FLAC already selected as the target format.
- There is no bitrate to choose: FLAC is lossless, so the bitrate field is simply ignored.
- Run the conversion and download the result — the output keeps your filename with a .flac extension. Everything happens locally: the page runs ffmpeg compiled to WebAssembly, so your audio is never uploaded to a server.
What to expect
No quality is restored. FLAC preserves exactly what's in your M4A file — detail the M4A encoder already discarded is gone for good. Expect a much larger file with identical sound; convert because a tool needs FLAC, not to upgrade the audio.
Embedded album art is dropped along the way: cover images ride along as a video stream, which audio-only outputs like FLAC can't carry.
FAQ
Does converting M4A to FLAC improve the audio quality?
No. FLAC preserves exactly what's in the source — detail the M4A encoder already discarded is gone for good. Convert because a tool needs FLAC, not to upgrade the sound.
Why is the FLAC file so much larger than my M4A?
M4A stores heavily compressed audio; FLAC stores a losslessly-compressed copy of the decoded audio — so the same sound takes several times the space. That's normal, and the extra bytes don't add quality.
Is my M4A file uploaded when converting to FLAC?
No. The page downloads an ffmpeg WebAssembly build once, then converts your file locally in the browser tab — the audio never leaves your device. Input files up to 10 MiB are supported.