M4A to FLAC Converter
Convert M4A to FLAC locally in your browser, powered by Mediabunny and native WebCodecs — nothing is ever uploaded. Drop a M4A file below to get started.
Drop files, or click to browse
M4A files only — processed one at a time
Frequently asked questions
Is this M4A to FLAC converter free?+
Yes, with no watermark, no account, and no daily limit.
Is my audio file uploaded anywhere?+
No — conversion runs locally using your browser's own built-in media codecs, entirely inside your browser tab.
Will I lose audio quality?+
Converting between compressed formats can lose a small amount of quality; converting to a lossless format like WAV or FLAC won't.
Is there a maximum file size?+
There's no fixed file-size limit since nothing is uploaded to a server. Processing time scales with the track's length rather than a hard cutoff.
How do I convert M4A to FLAC?+
Drop your M4A file into the box above — it's decoded and re-encoded as FLAC automatically, with a download ready in seconds.
About M4A and FLAC
What is M4A?
M4A is an audio-only MPEG-4 container, most often holding AAC audio — it's what Apple Music and Voice Memos save by default.
Full M4A format guide →What is FLAC?
FLAC is a lossless compressed audio format — same audio quality as WAV, but roughly half the file size thanks to genuine (not perceptual) compression.
Full FLAC format guide →People usually reach for this conversion because FLAC offers bit-perfect, lossless audio, sidestepping a real M4A weak spot: occasionally needs converting for apps that only expect MP3. It's especially useful for archiving music at full quality.
How it works
- 1
Drop your file in
Drag your audio onto the box above, or click it to browse — there's no account to create and no upload to wait on.
- 2
Pick your settings
The output format is already set for this page — just adjust any extra options shown, if there are any.
- 3
Download the result
Your browser processes everything locally and hands you a download link the moment it's done — nothing was ever sent to a server.
Is it private?
Everything happens locally, inside this browser tab. Your audio is read from disk, processed with WebAssembly running on your own device, and handed back to you as a download — it's never transmitted anywhere, so there's nothing to intercept and nothing stored on a server.
Common use cases
- Archiving music at full quality
- Audiophile listening
- Prepping a podcast episode for a hosting platform
- Fitting a voice memo under a messaging app's size limit
Supported formats
This is one of many pairings the audio toolkit handles. In total it covers:
Related conversions
Format details
About M4A files+
M4A is an audio-only MPEG-4 container, most often holding AAC audio — it's what Apple Music and Voice Memos save by default.
M4A is essentially an MPEG-4 container that's been restricted to audio only, and it's the extension Apple uses by default across iTunes downloads, Apple Music, GarageBand, and Voice Memos. In almost every practical case it holds AAC-encoded audio, so its quality and compression characteristics are effectively the same as AAC — it's really a matter of which extension a given piece of Apple software happened to save the file with.
How to open a M4A file
Opens readily in Any modern media player, iTunes/Apple Music, Most web browsers. For real editing, use Audacity (free), GarageBand.
Good for
- good compression efficiency
- native format across Apple apps
Watch out for
- occasionally needs converting for apps that only expect MP3
About FLAC files+
FLAC is a lossless compressed audio format — same audio quality as WAV, but roughly half the file size thanks to genuine (not perceptual) compression.
FLAC (Free Lossless Audio Codec) was built by the Xiph.Org Foundation to solve a specific problem: WAV files are lossless but enormous, while MP3 and AAC are small but throw away audio data permanently. FLAC compresses audio the way a ZIP file compresses text — genuinely, reversibly, with zero data loss — typically landing at 50–60% of the original WAV size. That makes it the go-to format for anyone archiving music at full fidelity, at the cost of files still noticeably larger than a lossy MP3 or AAC.
How to open a FLAC file
Opens readily in VLC Media Player, Most modern phones and media players. For real editing, use Audacity (free).
Good for
- bit-perfect, lossless audio
- smaller than WAV for the same quality
Watch out for
- not supported by every device, though support is broad among dedicated audio players
Need a different format? Try the full Audio Converter, or explore all audio tools.