How to convert Audible (AAX) to AIFF
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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 AIFF
NexMedia converts Audible (AAX) to AIFF 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 AIFF online free, no account required — AIFF is Apple's uncompressed audio format.
Change AAX to AIFF without losing quality — convert AAX to AIFF 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 AIFF
AIFF (Audio Interchange File Format) was developed by Apple in 1988 on the basis of the Electronic Arts IFF format, and it normally stores uncompressed PCM audio in big-endian byte order.
Professional audio on the Mac: Logic Pro and GarageBand projects, sample libraries and CD-quality masters.
AIFF files are as large as WAV files, about 10 MB per minute of CD-quality stereo, and some Windows programs handle them less readily than WAV.
Why convert audio to AIFF? For Mac production work: it is uncompressed like WAV, and iTunes, Logic and the rest of Apple's toolchain read it natively.
What changes when you convert AAX to AIFF
- The audio is decoded and re-encoded as AIFF at the default settings, so the result is close to the AAX but not bit-identical.
- AAX is a lossy format and AIFF is not: the AIFF 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.
- AIFF output is written as 16-bit PCM, so audio with a higher bit depth, such as 24-bit, is reduced to 16 bits.
Settings you can change
Before you convert AAX to AIFF, 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 AIFF file is kept for 2 hours, then deleted.
AAX to AIFF: questions and answers
Does converting AAX to AIFF reduce quality?
The audio is decoded and re-encoded as AIFF at the default settings, so the result is close to the AAX but not bit-identical. AAX is a lossy format and AIFF is not: the AIFF keeps the decoded AAX exactly, but it cannot restore detail the AAX compression already removed, and the file is usually larger. AIFF output is written as 16-bit PCM, so audio with a higher bit depth, such as 24-bit, is reduced to 16 bits.
What is the difference between AAX and AIFF?
AAX is Audible's DRM-protected audiobook format. AIFF is Apple's uncompressed audio format.
Can I change the settings when converting AAX to AIFF?
Before you convert AAX to AIFF, 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 AIFF?
No. You can convert AAX to AIFF without an account; signing in raises the file-size and daily limits.
How long is my converted AIFF file kept?
The AIFF file you convert from AAX is kept for 2 hours, then deleted automatically.
Will my AIFF keep the 24-bit sound of my AAX?
AIFF output is written as 16-bit PCM, so audio with a higher bit depth, such as 24-bit, is reduced to 16 bits.
Does converting AAX to AIFF restore the quality the AAX lost?
AAX is a lossy format and AIFF is not: the AIFF keeps the decoded AAX exactly, but it cannot restore detail the AAX compression already removed, and the file is usually larger.