OpenAudible is a cross-platform shareware application for downloading, managing, and converting Audible audiobooks. It is well maintained and costs a bit over #20 a year - openaudible.org 
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For an opnesource modern java-based alternative consider Libation.
# Overview
OpenAudible connects to an Audible account and automatically downloads owned titles. It preserves metadata such as title, author, and chapters, while converting files into standard formats that can be played on any device - openaudible.org
The program runs on Windows, macOS, and Linux. It includes an integrated library interface and can export audiobook metadata to HTML or JSON for cataloging - github.com/openaudible/openaudible
# Features - Automatic download and synchronization of Audible purchases - Conversion from `.aax` or `.aa` to `.mp3` or `.m4b` - Chapter preservation and metadata tagging - Export options for library metadata - Multi-platform desktop interface
# Activity and Support The project remains active and supported as of 2025. The official site lists version **4.6.1** released in **June 2025**, and the GitHub repository shows continuous updates through **late 2024–2025**.
Users continue to report issues and receive responses from maintainers, indicating that the project is maintained, though development appears focused on stability and incremental improvements rather than major new features.
- openaudible.org/versions
- github.com/openaudible/openaudible/releases
- github.com/openaudible/openaudible/issues
# Assessment OpenAudible is one of the most reliable tools for archiving Audible audiobooks. It is **actively maintained**, has regular releases, and continues to function across all major operating systems. While no longer fully open source, it remains the most practical solution for personal audiobook management and backup.
# See - OpenAudible CLI - AAXtoMP3 — Python-based converter using ffmpeg - AAX Audio Converter — Windows GUI - ffmpeg — Core utility used for audio decoding