Convert FLAC to M4A
Convert FLAC to M4A (AAC) for the Apple world. The whole process runs in your browser, so your file is never uploaded.
Why convert FLAC to M4A?
M4A wraps AAC audio in an MP4 container, and it is the native tongue of the Apple ecosystem. Convert FLAC to M4A when you want music that drops cleanly into iTunes, the Apple Music app, or your iPhone library, since iOS does not always play FLAC natively. It is also a smart pick for filling an iPhone or iPad with albums without eating storage. If most of your listening happens on Apple devices, M4A fits more smoothly than a raw FLAC.
Quality and file size
M4A is a lossy format, so this conversion re-encodes your FLAC and discards some data to shrink the file. AAC is efficient and tends to sound better than MP3 at the same bitrate, especially below 192 kbps, so it holds up well even at moderate sizes. Choose 256 kbps or higher for music you care about, where the loss is inaudible to most listeners. Keep your FLAC as the master, since the detail removed during AAC encoding cannot be recovered from the M4A later.
FLAC to M4A: common questions
Why M4A instead of MP3 for Apple devices?
M4A uses AAC, which is Apple's default and usually sounds better than MP3 at the same bitrate. It also slots neatly into iTunes, Apple Music, and your iPhone library.
Is M4A lossless like FLAC?
No. M4A here is lossy AAC, so it drops some data to save space. At 256 kbps or higher most listeners cannot tell, but keep the FLAC as your master copy.
Does my FLAC get uploaded?
No. Everything runs locally in your browser with FFmpeg in WebAssembly. Your file never leaves your device, and we never see it, store it, or train on it.
Will this play on an iPhone?
Yes. M4A is a native Apple format, so it plays in the Music app across iOS without extra software, unlike FLAC which iOS handles inconsistently.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.