AAX to FLAC Converter

Convert AAX to FLAC online quickly and easily. Just upload your file, convert it, and download the FLAC in seconds.

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What is AAX ?

AAX is a file format used by Audible to store audio books. It's the enhanced and improved form of the AA file format. AAX is a popular audio book file extension for more visual books like children's books since it supports the display of images. Images are automatically shown in the player alongside when the audio book plays.

AAX files can contain – next to the usual audio data, bookmark and chapter information – images and other features like links as well. This makes it a very popular extension primarily for children's books. AAX files support a bitrate from 32 to 128 kbit/s. The audio data is AAC encoded which provides a very high audio quality. AAX files are heavily protected and can only be played with a paid Audible.com account. Since the files almost always contain DRM protection, it is nearly impossible to play them on any other player than Apple iTunes, iPod or the Amazon Kindle 2.

Here's a small, but not exhaustive list of programs that can open AAX documents:

  • Apple iTunes (Windows & Mac)

AAX format  ▶

What is FLAC ?

FLAC (Free Lossless Audio Codec) is an audio format that compresses audio files without any loss of quality. It is widely used for storing high-fidelity music and is favored by audiophiles for its lossless nature, allowing for perfect reproduction of the original audio signal.

FLAC format  ▶

How to Convert AAX to FLAC in Just a Few Steps

  1. Upload your AAX file
    Drag and drop your AAX file, click 'Select Files' to upload from your device, or import directly from Dropbox, Google Drive, OneDrive, or paste a URL.
  2. Choose FLAC as output format
    The converter is preset to FLAC, but you can select any other output format before converting.
  3. Adjust settings (optional)
    If you like, tweak output options such as resolution, quality, or compression before converting.
  4. Convert the file
    Click the 'Convert' button. The conversion takes only a few seconds.
  5. Download your converted file
    Download the converted file to your device, or save it directly to Google Drive, Dropbox, or OneDrive.

Why Convert AAX to FLAC file?

If your .aax file came from Audible, it cannot be converted here — and not anywhere else on the web either. Audible audiobooks are encrypted with a key tied to the account that bought them. That key never leaves your own Audible account, so no website can unlock the file, however it is uploaded. The tools that do this run on your computer and sign in as you; that is the part a server cannot do.

There is a second, unrelated format that also uses the .aax extension: CRI AAX, a container used for audio in games and similar software. That one carries no encryption, and this converter handles it — it becomes FLAC, which is lossless and about half the size of WAV. If you are not sure which you have, upload it: an Audible file is recognised the moment you choose it and you will be told straight away, before anything is sent or spent.

Start converting AAX to FLAC now — it’s fast, safe, and completely online!

Frequently Asked Questions