Filenary

FLAC to M4A Converter

Convert FLAC audio files to M4A audio right in your browser — free, private and with no size limit.

Drop your file here

or click to browse

Choose File

On first use, a ~30 MB conversion engine is downloaded to your browser (one time only).

This file is processed in your browser and never uploaded to a server.

How to convert FLAC to M4A

  1. 1Drop your FLAC file into the box above, or click to choose it from your device.
  2. 2Click Convert. The conversion runs locally in your browser — nothing is uploaded.
  3. 3Download your new M4A file as soon as it's ready.

Why convert FLAC to M4A?

FLAC files are still large and aren't supported by some phones and players. M4A is the native audio format for iPhone, iTunes and Apple Music.

The size math: FLAC vs M4A

At typical quality a minute of content weighs about 5.5 MB as FLAC and 1.9 MB as M4A — after conversion your M4A file comes out about 2.9× smaller.

What is FLAC?

FLAC is a lossless audio format that compresses audio to about half the size of WAV without losing any quality.

  • MIME type: audio/flac
  • Released: 2001 by Xiph.Org Foundation
  • Lossless: shrinks WAV by 40–60% without losing a sample
  • The audiophile archiving standard

What is M4A?

M4A is an audio file in an MPEG-4 container, usually AAC. It's the default audio format on iPhone and in iTunes.

  • MIME type: audio/mp4
  • Introduced: 2003 with the iTunes Store
  • An MP4 container holding AAC (rarely ALAC) audio
  • Same sound as a bare .aac file, with wider app support

Frequently asked questions

Is this FLAC to M4A converter free?
Yes, it's completely free with no sign-up, no watermark and no daily limits.
Are my FLAC files uploaded to a server?
No. The conversion happens entirely inside your browser, so your files never leave your device.
Is there a file size limit?
Filenary sets no limit — even files over 1 GB work. The only practical limit is your device's memory.
Will converting FLAC to M4A reduce the quality?
M4A uses lossy compression, so the file becomes smaller with a small, usually invisible, loss of detail. Settings are tuned to keep the result sharp.
Can I convert several FLAC files at once?
This converter handles one file at a time. When it's done, click Start over to convert the next FLAC file.
Does it work on iPhone, Android, Mac and Windows?
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on phones, tablets and computers, with nothing to install.

More FLAC conversions

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