Add your FLAC file
Drop one or more .flac files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
FLAC to M4A
Re-encoding .flac audio as .m4a changes how the sound is compressed and which players will accept it. Free, private, and validated — the file never leaves your browser.
100% private for supported formats
Runs on your deviceConvert supported files
Drop FLAC files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting FLAC audio to MPEG-4 audio
Re-encoding .flac audio as .m4a changes how the sound is compressed and which players will accept it. A .flac file contains audio compressed with the Free Lossless Audio Codec, which shrinks recordings without discarding a single sample. Decoded .flac output is bit-identical to the source, so the format has become the standard for music archiving and high-resolution downloads.
An .m4a file is an MPEG-4 container that holds only audio, most often AAC and occasionally Apple Lossless. Apple coined the .m4a extension so audio would not be confused with .mp4 video, and it remains the default for iTunes purchases, Apple Music downloads, and Voice Memos. For this route the practical draw is real tagging and artwork support, unlike bare .aac streams and gapless playback metadata for continuous albums — balanced against the extension hides whether the contents are lossy or lossless, muddying quality expectations, which is worth knowing before you commit a large batch.
Why convert FLAC to M4A?
The practical trigger for this conversion is usually a mismatch: with .flac, still several times larger than a good lossy encode. Switching to .m4a buys you real tagging and artwork support, unlike bare .aac streams, which is why it is the better fit for managing music inside iTunes and Apple Music libraries. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
FLAC vs M4A at a glance
| Aspect | FLAC audio (.flac) | MPEG-4 audio (.m4a) |
|---|---|---|
| Format type | Lossless — every pixel or sample is preserved exactly | Lossy — discards detail it judges invisible to shrink files |
| How it stores data | linear prediction followed by Rice coding typically yields files 40 to 60 percent the size of raw PCM | an ISO base media container restricted to audio tracks, structurally a sibling of MP4 |
| Strongest at | ripping CD collections for permanent archival | managing music inside iTunes and Apple Music libraries |
| Weak spot | still several times larger than a good lossy encode | the extension hides whether the contents are lossy or lossless, muddying quality expectations |
| Metadata | vorbis comments for tags plus a dedicated PICTURE block for cover art; cue sheets can be embedded for whole-disc rips | iTunes-style metadata atoms: title, album, artwork, composer, BPM, and the iTunSMPB gapless-playback data |
Pick M4A as the output
Select .m4a in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if M4A is selectable, the route is real and validated.
Convert on your device
Press Convert. The transcode runs on an FFmpeg engine compiled to WebAssembly, so the audio never leaves your device.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid M4A file. Outputs keep the original filename with the .m4a extension.
FLAC to M4A questions, answered
Will converting FLAC to M4A lose quality?
Some. Since flac is lossless-oriented and m4a is lossy-oriented, the encoder will discard detail it judges least visible; the quality slider controls how aggressive that is. Keep the original .flac if you may need a pristine master later.
Is it private to convert FLAC files here?
Yes — the .flac file is processed inside your browser tab and never uploaded. The transcode runs on an FFmpeg engine compiled to WebAssembly, so the audio never leaves your device. Close the tab and the file is gone from memory.
Where will the M4A file work?
Browsers, Windows, Android, and every Apple device play AAC-based .m4a files without extra software. The ALAC-filled variety is slightly narrower, since some inexpensive devices decode only the AAC form.
Will the M4A file be bigger or smaller than my FLAC?
Smaller, usually dramatically so — that is the main reason this route exists. The quality slider trades size against fidelity; the default sits at the point where most people cannot spot the difference.
What happens to the metadata in my FLAC file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, vorbis comments for tags plus a dedicated PICTURE block for cover art; cue sheets can be embedded for whole-disc rips; none of it is transmitted anywhere because the file never leaves your browser.
Can I convert M4A back to FLAC?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .flac → .m4a → .flac is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.