Convert FLAC to M4A
Free online audio converter. Turn FLAC audio into M4A right in the browser. Files are never uploaded anywhere.
About FLAC and M4A
FLAC is lossless compression for audio — bit-identical to the source at roughly half the size of WAV. It is the archival format of choice for music collections and masters.
M4A is AAC audio in an MP4 container — the default format of the Apple ecosystem and most streaming services. AAC compresses more efficiently than MP3, so the same bitrate sounds a little better.
Converting FLAC to M4A is lossy. 192 kbps is transparent for most listeners on most material; pick 320 kbps for the ceiling, or drop lower when small files matter more than fidelity.
How the conversion works
This tool runs FFmpeg — the same engine behind most media software — compiled to WebAssembly, entirely in the browser. The file is read locally, converted locally and saved straight from memory; nothing is ever uploaded, which also means no queues and no server-side file size limits.
The converter itself is a one-time ~31 MB download on the first conversion, cached by the browser afterwards. Once it is loaded, everything works offline.
More audio converter pages
Free and open source from Earthling Digital, an independent creative agency. Built with Earthling UI.