How to convert Audible (AAX) to AAC
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert Audible (AAX) to AAC
NexMedia converts Audible (AAX) to AAC on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Audible (AAX)
AAX is the audiobook format of Audible: AAC audio in an MP4-style container, encrypted with Audible's DRM and tied to the buyer's account.
Audiobooks downloaded from Audible.
AAX files are DRM-protected, and DRM-protected files cannot be converted here.
Convert AAX to AAC online free, no account required — AAC is the lossy audio codec that succeeded MP3.
Change AAX to AAC without losing quality — convert AAX to AAC free in your browser.
Why won’t my AAX audiobook play outside the Audible app? Audible protects the files with DRM, so they only open in authorised apps — that protection is exactly why DRM-protected audiobooks cannot be converted here.
About AAC
AAC (Advanced Audio Coding) is the lossy audio codec standardised in MPEG-2 and MPEG-4 as the successor to MP3; at the same bitrate it generally sounds better than MP3.
It is the audio in most MP4 videos, in Apple Music and on YouTube; a .aac file is a bare AAC stream without a container.
A bare .aac stream has only limited room for tags and cover art, so music players usually expect AAC inside an M4A file.
Why convert music to AAC instead of MP3? At the same bitrate AAC sounds better, and every modern phone, computer and streaming service decodes it.
What changes when you convert AAX to AAC
- The audio is decoded and re-encoded as AAC at the default settings, so the result is close to the AAX but not bit-identical.
- AAX and AAC are both lossy formats, so this conversion adds a second round of lossy compression; keep the original AAX if you may need the best quality later.
- AAX files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert AAX to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted AAC file is kept for 2 hours, then deleted.
AAX to AAC: questions and answers
Does converting AAX to AAC reduce quality?
The audio is decoded and re-encoded as AAC at the default settings, so the result is close to the AAX but not bit-identical. AAX and AAC are both lossy formats, so this conversion adds a second round of lossy compression; keep the original AAX if you may need the best quality later.
What is the difference between AAX and AAC?
AAX is Audible's DRM-protected audiobook format. AAC is the lossy audio codec that succeeded MP3.
Can I change the settings when converting AAX to AAC?
Before you convert AAX to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert AAX to AAC?
No. You can convert AAX to AAC without an account; signing in raises the file-size and daily limits.
How long is my converted AAC file kept?
The AAC file you convert from AAX is kept for 2 hours, then deleted automatically.
My AAX is already lossy — does the AAC lose even more?
AAX and AAC are both lossy formats, so this conversion adds a second round of lossy compression; keep the original AAX if you may need the best quality later.
What happens if my AAX file is copy-protected?
AAX files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.