FLAC to M4A converter
Repack lossless FLAC as efficient AAC in an M4A container that iPhones, iTunes, and Apple Music accept without complaint. Conversion happens in your browser — the file never touches a server.
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FLAC is a lossless codec that preserves every bit of the original recording, but Apple's ecosystem never fully adopted it — the Music app and iTunes still refuse to import or sync a raw .flac file. This tool decodes the FLAC and re-encodes the audio as AAC inside an .m4a container, the format Apple treats as a first-class citizen. The result drops straight into an Apple Music or iTunes library where the FLAC would have been rejected, which is exactly what people mean when they search for how to add FLAC to Apple Music or play FLAC on an iPhone.
Reach for it whenever you have lossless files — Suno downloads, Bandcamp purchases, or CDs you ripped to FLAC — that you actually want to hear on an iPhone, iPad, or through CarPlay. Because AAC is lossy, the .m4a trades a small amount of largely inaudible detail for a file that plays everywhere Apple hardware does and takes up a fraction of the space. Keep the FLAC as your archive master and treat the M4A as the portable copy you carry around.
How it works
- 1
Drop the FLAC file.
- 2
Click convert.
- 3
Download the M4A.
When to use it
- Adding a finished Suno track you downloaded as FLAC into your iTunes or Apple Music library so it syncs to your iPhone and shows up in playlists — something the Music app blocks for raw .flac files.
- Texting a song to an iPhone-using collaborator or listener, where an .m4a plays inline in the Messages thread while a .flac arrives as a plain file attachment they have to tap through to a preview app.
- Loading tracks onto your phone for CarPlay or a factory car stereo that recognizes AAC/M4A but has no idea what a FLAC is.
FLAC vs M4A (AAC)
| FLAC | M4A (AAC) | |
|---|---|---|
| Lossless | Yes | No |
| Typical size | Medium (~50–60% of WAV) | Small (efficient) |
| Best for | Lossless archiving | Apple devices & modern players |
| Compatibility | Most modern players | Apple ecosystem, most players |
FAQ
Does M4A keep the FLAC's lossless quality?
No — AAC is lossy, so FLAC→M4A discards some detail permanently. Keep the FLAC as your master and treat the M4A as the Apple-friendly copy.
Why M4A instead of MP3 for Apple devices?
AAC (M4A) is Apple's native format — at the same 192 kbps it's slightly more efficient than MP3 and slots cleanly into iTunes and Apple Music libraries.
Can my iPhone play FLAC files without converting them first?
Since iOS 11 the Files app will play a FLAC you tap directly, but the Music app and Apple Music library still won't import or sync one. Converting to M4A (AAC) is how you get the track into your library, playlists, and offline downloads on the phone.
M4A can be lossless too — should I pick ALAC instead of AAC?
M4A is only a container; it can hold lossy AAC or lossless ALAC. This tool writes AAC, which is smaller and universally supported across Apple apps. If you specifically need bit-perfect lossless on Apple devices, convert to ALAC (.m4a) or just keep the FLAC — AAC won't reconstruct that detail.
Does converting a 24-bit hi-res FLAC keep the hi-res detail?
No. AAC is a lossy perceptual codec, so 24-bit/96kHz information isn't retained the way FLAC stores it. For casual listening the AAC usually sounds transparent, but if you need the full hi-res master, stay on the FLAC.
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