Convert FLAC to M4A
Upload a FLAC file and convert it to M4A — all in your browser.
Upload a FLAC file and convert it to M4A — all in your browser.
M4A is AAC audio packed into an MP4 container. This tool decodes your lossless FLAC and re-encodes it as high-quality AAC, producing a much smaller file that the entire Apple ecosystem treats as a first-class citizen.
The conversion is lossy, so keep the FLAC originals as your archive. For listening on phones and laptops, the difference from lossless is inaudible for most people.
iPhones, iPads, and Macs play M4A natively in Music, Files, and iMessage. FLAC support on Apple platforms is limited and awkward, so converting your library to M4A is the standard route for getting lossless collections onto Apple hardware without third-party apps.
M4A also supports proper metadata: titles, artists, albums, and embedded cover art all carry over into apps that read MP4 tags.
M4A is AAC audio inside an MP4 container. The container adds support for tags and cover art and is what most apps expect. Raw .aac files are bare streams used mostly in technical pipelines.
It will sound the same to most ears on most gear, but it is not bit-identical. AAC discards data the encoder judges inaudible. Keep the FLAC if you care about a perfect archive.
Yes. The conversion runs on your device in the browser. No uploads, no accounts, no file size caps.