inAudible VS AudioBookConverter

You can use software like Libation, AAX Audio Converter or inAudible to decrypt Audible books.

Libation author here. Libation reads directly from your audible account and downloads/decrypts in one step. No aax, just straight to m4b. There's also a setting to convert to mp3 instead. It cannot take existing aax files and do this. inAudible can target aax files directly but it's getting a bit long in the tooth so it's not as reliable as it used to be. I've never tried aaxtomp3.

Sorry no. You can try inAudible for that but it's rather out of date. Libation gets your encrypted files from audible and decrypts them on the fly. It's against the terms of service/conditions of use regardless, one just happens off line.

As u/JethroMcClintock said, there's inAudible (windows). It hasn't been updated in a long time so it might not work for some users. The people it does work for all seem to love it

If you have the AAX files, you can convert these to MP3s using inaudible. You do need to install the Lame codec for this to work, then it's fairly seamless. The way I look at it, you paid to buy these books, so converting them to MP3 prevents you from losing access to them in situations like this. (There is no difference between these mp3s and any other mp3 file you upload to your audio player).

Installers are here but it's unfortunately quite out of date. It was last updated in 2017 and Audible has since changed most of their catalog to a format which inAudible can no longer decrypt.

TIPP: A great tool to convert audible books into mp3: https://github.com/rmcrackan/inAudible

https://github.com/yermak/AudioBookConverter Apparantly this is a good program to use. You should be able to convert them to a single m4b file and it should keep all the chapters intact.

Source: https://github.com/yermak/AudioBookConverter

Audiobookconverter can combine multiple mp3s into a single mp4

Audiobook Converter - Takes anything not an M4B and makes it an M4B (and can add some basic metadata to an M4B). For Plex, I've found it useful to have one file for playback vs. all the mp3 files (plus it's a lot cleaner)

I also had this issue with Audiobookbinder and switched to AudiobookConverter for longer book bindings

However, I only went through the trouble because I didn't want audio quality to be affected at all (nothing to be encoded again, only removed). If you are not too concerned about audio quality, there is definitely programs out there on Mac that can chapterize files. M4btool is pretty powerful and there is Audiobook converter. I've heard AudioBookBinder might work as well, though I think it is older at this point.

some audiobooks come in multiple mp3 so i merge a books tracks all into one file to save the headache of adding meta data to sometimes 100s of files for one book. I use https://github.com/yermak/AudioBookConverter to merge mp3s into m4b which I've seen being a standard for audiobook file format but mp3 will also work if you like that extension.

Yermak's AudioBookConverter is phenomenal. Development is on hiatus due to the war in Ukraine, but the most recent version is still available on Github.