9 Best Free Audible Converters & Downloaders in 2025 [Hands-on Review]

Over the years I've listened to more than 300 audiobooks on Amazon's Audible. The catalog is huge, but I've also run into one big drawback: every book I buy lives inside the Audible app as an AA or AAX file, wrapped in DRM. It becomes very hard to keep listening freely on other devices. So from my very first year with Audible, I have been using free Audible converters and downloaders to turn audible to mp3 files.

In this article I will walk through the 9 best free AAX to MP3 converters I have used over the years, what they can do, their pros and cons, and how I actually use them to convert Audible books to MP3 or other formats in daily life.

Why You Need a Audible converter:

• Audible listening is no longer locked inside the Audible app. You can convert Audible books to mp3 formats, then play your audiobooks almost on any device.
• Most of them can remove Audible's technical DRM restrictions for personal use, so you can back up the books you purchased instead of relying entirely on a single subscription app.
• Most audio editing tools support MP3, so you can cut and edit your Audible content more easily for study, note taking, or your personal collection.

Best Audible Converter/Downloader: BookFab Audible Converter [My TOP Pick]

How to Download/Convert AAX to MP3 with BookFab Audible Converter

Step 1: Download and install BookFab

Step 2: Open the Audible Converter module and sign in

Launch the program and click Audible Converter in the menu.
In the built-in browser, enter your Audible email and password to sign in.
After signing in, your Audible library will appear inside BookFab.

Note: BookFab Audible Converter's built-in browser does not store any of your account information. We place user privacy and data security first.

Step 3: Choose the audiobooks to download and convert

Browse or search your Audible Library in the built-in browser and select the titles you want to back up or convert. The app will read basic title information so you can review what you plan to convert.

Step 4: Set the output format

Open Settings and choose your default output format, for example M4A for audiobook apps or MP3 for maximum compatibility. 

Step 5: Download audible books to mp3

Confirm your task list, then click the Download button to start. BookFab Audible Converter will download from Audible and convert locally to your chosen format, embedding chapters and metadata. When it finishes, you will find the converted files in your selected output folder. 

8 Free Audible Converters: Reviews Based on Tests

#1 audible-tools (Best Free Online Converter)

audible-tools.kamsker.at is the best free online Audible converter focused on downloading AAX files to MP3, M4B, and other audio formats. It performs conversions locally in the browser, which gives it better privacy compared with dragdrop. It also supports batch conversion and offers advanced options such as Expert Mode.

In the default mode, audible-tools is more of a "foolproof" experience: I only need to drag in the .aax file and choose an output format, and the tool will try to automatically handle the activation bytes required for decryption, then directly export M4B or MP3. Expert Mode is geared toward advanced users and exposes more low-level parameters, such as manually entering activation bytes and tweaking FFmpeg encoding options to control the output audio quality.

How to Download Audiblebooks to MP3 with audible-tools.kamsker.at

1. Open audible-tools.kamsker.at in your browser. Drag one or more .aax files into the "Drag and drop AAX files here or click to select" area in the center of the page, or click that area to manually select files from your computer.

2. Choose the target output format. If you have specific requirements for audio quality or file size, you can enable Expert Mode and fine tune advanced encoding parameters such as bitrate.

3. Click the Convert button and wait for the browser to finish local processing. Once the conversion is complete, the generated audio files will be automatically downloaded to your computer.

#2 DragDropDo (Online)

DragDropDo is a free online Audible converter that runs entirely in your browser, with no software installation or account required. It supports many different formats, with a dedicated module for converting AAX to MP3, and it also supports encrypted file transfer. You can upload multiple files at once or even a whole folder, and DragDropDo can batch-convert these AAX files, but on the free plan uploads are limited to 300 MB per file. In my tests, what I liked most is that you don't need to worry too much about privacy: this Audible to MP3 converter promises that your uploaded files are automatically deleted after 24 hours.

How to Convert AAX to MP3 with DragDropDo Audible Converter

1. Open your browser and visit DragDropDo's dedicated AAX to MP3 conversion page.

2. Drag and drop one or more .aax files (or an entire folder) onto the page, or click the Files or Folder button to select them manually.

3. In the search box, type convert.

4. Click Audio, then set your output format, for example MP3.

5. Click Continue. DragDropDo will complete the conversion on its backend servers and generate the corresponding MP3 output files. Click Download to save them to your computer.

#3 AAX Audio Converter

• Available on: Windows 10/11

AAX Audio Converter is a free and open source desktop audio converter for Windows devices, designed to convert Audible .aax audiobooks to MP3, M4A, or M4B. Unlike online tools, this audio converter supports splitting tracks by whole book, by chapter, or by fixed duration. After conversion, it can also preserve chapter information and metadata.

How to Use AAX Audio Converter?

1. Download your Audible files. To avoid unnecessary hassle, it is recommended to install the developer's companion Audible downloader Book Lib Connect (completely free and safe) to download your Audible AAX files, then import them into AAX Audio Converter. If you do not download them via Book Lib Connect, you will be asked to provide the Audible activation code linked to your account, which is more cumbersome.

2. Download and install AAX Audio Converter. Make sure your system is Windows 10/11 and that .NET Framework 4.8 is installed. If it is missing, the program will prompt you and guide you through installing it.

3. Open AAX Audio Converter and add your local .aax files to the list. For multi-part audiobooks, the program can detect them and group them by book.

4. Choose the output format and processing mode.

In the settings, select the output format: MP3 or M4A/M4B. Then, choose a processing mode:

• Output one file per book
• Split into multiple files by chapter
• Split by chapter and then further by fixed duration
• Ignore chapters and split only by fixed duration

If you have added multiple audiobooks, you need to configure these options for each book.

5. Click the Convert button to start to convert AAX to MP3.

#4 inAudible

• Available on: Windows/Mac

inAudible is an unofficial free Audible conversion tool created by GitHub user rmcrackan, available for Windows and macOS. It is also based on FFmpeg and can convert encrypted Audible AA or AAX audiobooks to four formats: MP3, M4B, WAV, and AAC (the macOS version does not support WAV output). This free Audible converter lets me adjust bitrate and sample rate, and it can also split by chapters and segments. I found that the Windows version additionally supports batch conversion, ripping CDs, editing ID3 tags, and merging MP3 files and other advanced features.

How to Use inAudible to Convert AAX files to MP3?

1. Download and install inAudible. Since inAudible has no official website, it is distributed through the community and third party sites, so you need to carefully check that your download source is safe.

2. Open inAudible and click the Load files button to browse your computer and add the audiobooks you want to convert. To add more audiobooks for conversion, you can click File > Open > Audible/M4B.

3. In Output Type box, choose the output format. You can also adjust the sample rate, select the audio channels, and so on.

4. Click the Begin Conversion button and inAudible will start converting your Audible files to MP3 or other formats. When the conversion is complete, click Output files to open your output folder.

#5 AudibleChapters

• Available on: Windows

AudibleChapters is a long standing Windows Audible converter utility. It was originally designed to parse chapter information from Audible AA/AAX audiobooks and, together with an external encoder, split the whole book into chapter based MP3 or WAV files.

How to Use AudibleChapters to Convert AAX to mp3?

1. Download AudibleChapters, extract the zip, then run the application.

2. Choose the first option, "I have an AAX file, which plays fine in Audible Manager", to open the AAX conversion interface.

3. Upload the AAX file. In Compression Options, select the output format. Finally, set the destination path for the output files.

4. Click the Start button to begin the conversion. You can see the progress in the Status / Result section.

#6 AAXtoMP3 Audible Converter

• Available on: Windows/Mac/Linux

AAXtoMP3 is a best free Audible converter & Audible downloader developed by GitHub user KrumpetPirate. It uses a Bash script that calls FFmpeg to convert Audible AAX/AAXC audiobooks into more common formats like MP3, M4A, M4B, FLAC, or OGG, which makes it easier to play and back up my audiobooks on more devices. Although this Audible to MP3 converter is completely free, the workflow involves the command line and is quite complex, so after testing it I would not recommend this method to beginners.

How to Use AAXtoMP3 Converter

Since AAXtoMP3 is a Bash script, running it on Windows requires a compatible command line environment (such as Git Bash or WSL). So my workflow on Windows looks like this:

1. Prepare the runtime environment and dependencies
  a. Install a Bash environment: If WSL is not installed, you can install Git for Windows, which comes with Git Bash. All subsequent commands are executed in this environment.
  b. Install FFmpeg: AAXtoMP3 relies on FFmpeg to perform the actual transcoding. Make sure FFmpeg is installed either on my system or in my Git Bash/WSL environment. In Git Bash or WSL, check with:ffmpeg -version

2. Get the authorization code (Authcode)
AAX files require the 16 digit authorization code (Authcode) from my Audible account for decryption. This is the most critical step.
  a. Install the Audible command line tool: In Git Bash or WSL, I first make sure Python and pip are installed, then install the audible-cli tool:pip install audible-cli
  b. Get the Authcode: Run the following command. The tool guides you through logging into my Audible account and finally shows your 16 digit Authcode:python -m audible_cli activation-bytes
  c. Save the Authcode: Copy the displayed 16 digit code (for example: 1A2B3C4D5E6F7890) and keep it somewhere safe.

3. Prepare the AAXtoMP3 script and input files
  a. In the directory where you want to store my audiobooks, download the AAXtoMP3 script file with:wget https://raw.githubusercontent.com/KrumpetPirate/AAXtoMP3/master/AAXtoMP3
  c. Grant the script execute permission:chmod +x AAXtoMP3
  d. Place the .aax file you want to convert (for example my_book.aax) in the same directory.

4. Run the conversion command
In Git Bash or WSL, run the following commands, replacing the Authcode and file name with your actual values:

• Default conversion (split into multiple MP3 files by chapter):./AAXtoMP3 -A my_book.aax
• Convert to a single MP3 file (no chapter splitting):./AAXtoMP3 -A -s my_book.aax

After the conversion is complete, you can find the output MP3 files in the current directory.

#7 Libation Audible Converter

• Available on: Windows/Mac/Linux

Libation is an open source Audible converter available for Windows, macOS, and Linux. In testing, the highlight of this free Audible to MP3 converter is that you can import your entire audiobook library from your Audible account and remove DRM at the same time while downloading. It can download Audible books and convert them to common formats like MP3 in one go, which makes it convenient for local backup and cross device listening. It is well suited for managing your audiobooks, preserving ID3 tags, splitting audiobooks into chapters, and even exporting your library to an Excel spreadsheet for offline collection management.

How to Use Libation Audible Downloader?

1. Run Libation. Click Settings > Accounts. In the popup window, enter your Audible email address under Audible email. Then, select the correct Audible region from the Locale dropdown menu. Click the Save button in the lower right corner. Then, an Audible login page will appear. Enter your Audible username and password.

2. After a successful login, return to the main Libation interface, switch to the Import tab in the upper left, and select Scan library. Libation will then automatically sync and load all available audiobooks from your Audible account.

3. Click the traffic light icon next to the audiobook you want to download. Libation will automatically download audible book to M4B file and save it locally. If you want to download Audible books as MP3 files, go to Settings > Settings > Audio File Options and select Download my books as .MP3 files (transcode if necessary). After you apply this setting, your Audible books will be downloaded as MP3 files.

#8 Audacity (Audible Playback Recording)

• Available on: Windows/Mac/Linux

Audacity is actually not an Audible converter. It is a free, open source audio recording program. You can play Audible chapters on your computer, then use Audacity to record them and export the result as WAV or MP3, which works as a simple AAX to MP3 workaround. However, during my tests I ran into a small pitfall: while recording, you need to remember to turn off system notification sounds, otherwise they will be recorded as noise.

How to Use Audacity to Download Audible Books to MP3

1. Start Audacity. In Audacity's device settings, choose the audio host and recording device.

2. Open the app or webpage you use to listen to Audible, locate the chapter or segment you want to record, and pause it at the starting position. Turn off notification sounds and system alerts in other apps so they will not be recorded.

3. In Audacity, click the Record button to start capturing desktop audio. Then click Play on the Audible side and let the entire section play through at normal speed.

4. After Audible finishes playback, stop recording in Audacity. The full waveform will appear on the track. I usually delete the blank section at the beginning and any extra audio at the end, then add fade in and fade out effects.

5. In the Export menu, choose MP3 and save the file locally.

Comparison of 9 Best Free Audible Converters

Conclusion

After a comprehensive review of 9 best free Audible converters and Audible downloaders, I've found that each tool has its own characteristics.

• If you care about output format, audio quality, chapters and metadata, BookFab Audible Converter ticks all the right boxes. Personally, its flexibility has greatly improved my listening experience. I can say with this best free Audible downloader, you won't have to worry about your audiobook management anymore.
• If you prefer a online program to convert AAX files to MP3, audible-tools.kamsker.at is the way to go.
• If you just want a free and lightweight desktop app, go with AAX Audio Converter and pair it with the Audible downloader Book Lib Connect.

Disclaimer: BookFab discourages any DRM circumvention for commercial, distribution, or public sharing purposes. The tools outlined here are solely for users to manage and back up audiobooks they have legally purchased for personal use. Please comply with all local copyright laws when creating backups.