How to convert Audible (AAX) to FLAC
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert Audible (AAX) to FLAC
NexMedia converts Audible (AAX) to FLAC on its own servers. Processing time depends on the file size and how busy the queue is.
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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 FLAC online free, no account required — FLAC is a lossless compressed audio format.
Change AAX to FLAC without losing quality — convert AAX to FLAC 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 FLAC
FLAC (Free Lossless Audio Codec) compresses audio without losing anything: the files are typically half to two thirds the size of WAV and decode back to the exact original samples.
Music archives, CD rips and high-resolution downloads.
FLAC files are several times larger than MP3, and some older players and car stereos do not play them.
Why convert CDs to FLAC instead of MP3? The copy is bit-for-bit identical to the original, so the archive never loses quality however often it is converted later.
What changes when you convert AAX to FLAC
- The audio is decoded and re-encoded as FLAC at the default settings, so the result is close to the AAX but not bit-identical.
- AAX is a lossy format and FLAC is not: the FLAC keeps the decoded AAX exactly, but it cannot restore detail the AAX compression already removed, and the file is usually larger.
- 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 FLAC, 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 FLAC file is kept for 2 hours, then deleted.
AAX to FLAC: questions and answers
Does converting AAX to FLAC reduce quality?
The audio is decoded and re-encoded as FLAC at the default settings, so the result is close to the AAX but not bit-identical. AAX is a lossy format and FLAC is not: the FLAC keeps the decoded AAX exactly, but it cannot restore detail the AAX compression already removed, and the file is usually larger.
What is the difference between AAX and FLAC?
AAX is Audible's DRM-protected audiobook format. FLAC is a lossless compressed audio format.
Can I change the settings when converting AAX to FLAC?
Before you convert AAX to FLAC, 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 FLAC?
No. You can convert AAX to FLAC without an account; signing in raises the file-size and daily limits.
How long is my converted FLAC file kept?
The FLAC file you convert from AAX is kept for 2 hours, then deleted automatically.
Does converting AAX to FLAC restore the quality the AAX lost?
AAX is a lossy format and FLAC is not: the FLAC keeps the decoded AAX exactly, but it cannot restore detail the AAX compression already removed, and the file is usually larger.
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.