Suppose you have a large collection of MP3 files ripped from audiobook CDs and want to listen to them on media players like iTunes, VLC, etc. But the problem is that MP3s don't natively support chapters or bookmarks, making it difficult to keep track of your place. So, is there a way to convert these MP3 files into a format like M4B or M4A to enhance the listening experience? Because M4Bs supports chapters, saves playback positions and offers better metadata organization.
In this guide, we'll cover ways to convert MP3 to audiobook (M4B or M4A) for free on Windows, Mac, iPhone, and Android.
Quick Answer for Converting MP3 to Audiobook:
Best for Power Users and Best Overall: AudFree Audio Capture (Batch Conversion and Keep Chapters);
Best for Mac Users: iTunes/Apple Books or Audiobook Binder;
Best for Quick Use: Online converters
Part 1. How to Convert MP3 to Audiobook with Chapters for Windows/Mac (Best Way)
Best For: Users who need to quickly convert a large collection of media, and require automatic chapter markers and lossless audio quality.
Though there are free and online tools to create audiobook from MP3 files, they don't meet your needs. Some of them may lack chapter support and offer less features. If you're looking for a more professional solution that supports chapters and preserves quality, you might want to try a dedicated desktop application. This part will introduce a powerful tool that offers more control and advanced features.
AudFree Audio Capture is a powerful solution to batch convert MP3 files into M4B audiobooks with chapter. With its advanced capturing technology, it records audio directly from your computer's sound card without any quality loss. This makes it possible to re-encode your MP3 audiobooks into M4B format while preserving chapters, metadata, and ID3 tags. More importantly, you can trim, split, or merge multiple MP3 recordings before exporting them as a single M4B audiobook file.
It supports over 16 output formats including MP3, M4B, M4A, WAV, AAC, FLAC, OGG, and more, giving you full flexibility to play your audiobooks on iTunes, iPhone, iPad, Android, or any audiobook player. Whether you want to keep long MP3 lectures in M4B with chapter markers or simply enjoy audiobooks with resume-playback support, this tool can handle it efficiently.
AudFree Audio Capture for M4B Downloads
- Best MP3 to M4B audiobook downloader to capture audio losslessly
- Offer up to 16 output formats, including M4B, M4A, MP3, FLAC, etc.
- Support cutting and trimming audiobook and modifying ID3 tags
- Full compatible with both Mac and Windows
How to Convert MP3 Audios to M4B Audiobook via AudFree Audio Capture
- Step 1. Download and launch AudFree Audio Capture
- Download and launch AudFree Audio Capture on your Mac or Windows computer. On the home screen, click the 'Select/Add an App' button to choose the player (such as iTunes, Windows Media Player, QuickTime, etc.) from which you will play your MP3 audiobook files.
- Step 2. Customize output settings to M4B
- Click on the 'Format' button at the bottom-left corner. Choose M4B as the output format. Here, you can also set parameters such as audio codec, channel, sample rate, and bitrate. Once done, confirm your choices with 'OK'.
For audiobooks, you can set the bit rate to 64kbps or 96kbps, which is sufficient to meet the requirements for spoken audio.
- Step 3. Play MP3 files and start capturing
- Return to the main interface and hit the target app you added. Now, play your MP3 audiobook files, and AudFree will automatically begin recording them in real time. To finish, simply click the 'Stop' button in the AudFree interface.
- Step 4. Edit and save MP3 as M4B audiobooks
- Once the recording is complete, you can trim unwanted sections, merge clips, or edit ID3 tags (like title, author, or cover art). Finally, click 'Save' to export your audiobook in M4B format for seamless playback on iTunes or any audiobook app.
If you'd like to convert encrypted audiobook formats such as Audible AA or AAX files directly into M4A or M4B, the most efficient solution is AudFree Audible Converter. Unlike basic MP3 to M4B converters, this tool comes with advanced decryption technology that removes protection from Audible audiobooks and exports them into popular formats including M4B, M4A, MP3, FLAC, AIFF, and WAV. Even better, it preserves 100% original sound quality, keeps all ID3 tags, and supports splitting audiobooks by chapters for easier navigation.
With it, you can adjust output settings, such as bitrate, sample rate, and audio channels, or customize ID3 tags before conversion. The process is simple: just import your Audible books into the program, choose M4A or M4B as the output format, and click 'Convert'. Within minutes, you'll have DRM-free audiobooks that can be played smoothly on iTunes, iPhone, Android devices, or any standard audiobook player, without worrying about subscription or compatibility issues.
View also: How to Convert Audible to MP3
Part 2. How to Convert MP3 to Audiobook (M4B) Free
If you are looking for the best free MP3 to M4B converters, you can't go wrong with the three tools presented in this section. They make it simple to convert MP3 to audiobook format and even support features like chapters, metadata, and batch conversion. Plus, we'll also introduce MortPlayer Audio Book, one of the best free MP3 audiobook players to play your audiobooks directly without conversion.
1. AudioBookConverter 6.5.2 (Windows)
AudioBookConverter 6.5.2 is a Windows-based MP3 to audiobook converter free that allows you to quickly turn your MP3 files into M4B audiobooks. It supports batch processing, letting you 'combine multiple MP3 to M4B' with chapters and bookmarks. You can also edit metadata like title, author, and genre to organize your audiobook library easily.
How to Convert MP3 to M4B for Free on Windows via AudioBookConverter
Step 1. Download and install AudioBookConverter 6.5.2 on your Windows PC.
Step 2. Launch the software and click 'Add Files' to import the MP3 files you want to convert.
Step 3. Choose output format as M4B and adjust settings such as bitrate, sample rate, or chapters.
Step 4. Click the 'Start' button to start the process. The converted M4B audiobooks will be saved to your chosen folder and can be synced to iTunes.
2. Audiobook Binder (iPhone/Mac)
Audiobook Binder is a free tool compatible with iOS and Mac devices to convert MP3 to audiobook (M4B) format. It allows you to change cover artwork, as well as adjust encoding properties, such as mono/stereo and sample rate. Once encoded, it automatically adds the M4B audiobook file to your iTunes (or Apple Books) library. With this app, you can easily combine multiple MP3 files into one audiobook with chapters for seamless playback.
How to Convert MP3 to M4B for Free on iPhone/Mac via Audiobook Binder
Step 1. Download and install Audiobook Binder on your Mac or iPhone.
Step 2. Run the app and select the 'Files' tab.
Step 3. Click the '+' icon or drag-and-drop MP3 files into the app.
Step 4. Customize metadata like title and cover, then press 'Bind' to start conversion. The new M4B audiobook will be saved to iTunes or Apple Books automatically.
3. M4B Converter - MP3 to M4B (Windows)
M4B Converter - MP3 to M4B (Windows) is a modern MP3 to audiobook converter for Windows. It can convert MP3 to audiobook format with chapters. It is available from the Microsoft Store and features a clean interface with support for batch conversion. Users can combine MP3 to M4B into a single audiobook and adjust metadata before exporting.
How to Convert MP3 to Audiobook for Free on Windows via M4B Converter
Step 1. Download and install M4B Converter - MP3 to M4B from Microsoft Store.
Step 2. Launch the app and click 'Add Files' to import your MP3 tracks.
Step 3. Edit audiobook details such as title, author, or cover, and enable chapters if needed.
Step 4. Hit 'Convert' to start. The tool will convert MP3 to M4B with chapters and save them locally for iTunes or any audiobook player.
MortPlayer Audio Book is a dedicated audiobook player available on Android, iPhone, and other platforms. It supports MP3, Ogg Vorbis, M4A, 3GP, MIDI, and Wave formats. With MortPlayer, you don't need to convert MP3 to M4B at all - you can listen to MP3 audiobooks on Android or iPhone directly' with chapter navigation, sleep timer, and bookmarking features.
Part 3. MP3 to Audiobook Converter Online [Top 4]
If you don't want to install extra software on your device, you can try the following MP3 to M4B converter online free tools. These web-based services let you convert MP3 to audiobook format online and even play those audiobooks on MP3 players or any other device without limitations. Most of them are simple, fast, and user-friendly, but each comes with its own restrictions such as file size or daily limits.
Top 1. Media.io MP3 to M4B Audiobook Converter Online
Media.io serves as a free audiobook converter online. It allows users to convert various audio and video files into a variety of formats. Plus, it is dedicated to other services such as compressing files, editing videos, and more. With a lot of input and output formats, this online gadget is a convenient tool to modify or optimize media files.
However, Media.io will take a lot of time to complete the converting process with the limitations on file size and number of conversions per day. Also, if you want to download the converted files, it requires you to register and log in on its website, which may leak your privacy.
How to Convert MP3 to M4B Audiobook Online Using Media.io
Step 1. First, from the 'Convert' section, select the former format as MP3 and the later format as M4B. Alternatively, drag and drop the MP3 files to the online tool's interface directly.
Step 2. Click on the 'Choose Files' button to choose and add the MP3 files you want to change to M4B. The added files will load and display automatically on the website.
Step 3. Hit the bottom 'CONVERT' button to convert MP3 to M4B free.
Step 4. Once converted successfully, you can opt to convert more files. Or, hit the 'Download' button to get the M4B files for offline listening.
Top 2. Read-To-Me M4B Converter
Read-To-Me M4B Converter is a specialized online MP3 to audiobook converter that focuses on creating M4B files with chapter support. Unlike general media converters, it is designed specifically for audiobook lovers. It also provides options to merge multiple MP3 files into one continuous M4B audiobook with metadata editing like title and author.
How to Convert MP3 to Audiobook M4B Online via Read-To-Me M4B Converter
Step 1. Visit the official Read-To-Me M4B Converter website.
Step 2. Upload your MP3 files by clicking 'Select Files' or using drag-and-drop.
Step 3. Edit metadata such as audiobook title, author, or cover image if needed.
Step 4. Click 'Convert' to generate your M4B file, then download it to your device.
Top 3. Vertopal MP3 to M4B Converter Online
Vertopal MP3 Audios to M4B Converter is another online platform that supports free MP3 to M4B audiobook conversion. The service is known for its simple three-step process and a wide range of supported formats. With Vertopal, you can easily convert MP3 to audiobook M4B online without installing any software. It's lightweight and works well for quick conversions, though advanced audiobook features like chapters are limited.
However, this tool won't support chapter and provides limited customization.
How to Convert MP3 to Audiobook Online via Vertopal
Step 1. Open the Vertopal MP3 to M4B Converter page.
Step 2. Click 'Choose File' to upload your MP3 file.
Step 3. Select output format as M4B, then press 'Continue'.
Step 4. Wait for the conversion and click 'Download' to save your M4B audiobook.
Top 4. SafeAudioConverter
SafeAudioConverter is another MP3 to M4B audiobook converter online we'd like to introduce. Resemble Media.io, it also boasts an intuitive and easy-to-use interface. This online audio converter also supports uploading multiple formats and converting them to local files in various formats. Better than Media.io, SafeAudioConverter allows you to customize the audio quality for your files, including changing the bitrate, sample rate, and audio channels.
But its downside is the audio quality is limited up to 256kbps and there is no chapter support.
How to Convert MP3 to Audiobook Using SafeAudioConverter
Step 1. On the online converter's website, hit the 'Upload Your Audio' button.
Step 2. Drag & drop your MP3 audio files to the designated area. Or, tap the 'Browse on your device' button to add your files.
Step 3. Adjust the bitrate, sample rate, or audio channel for your added files.
Step 4. Once completed, hit the lower 'Convert' button to kick off the conversion.
Step 5. Then click on the 'Download' button to keep MP3 to M4B audiobooks offline forever.
Part 4. How to Create Audiobook from MP3 in iTunes/Apple Books App
If you prefer using the native Apple apps, you can use iTunes or Apple Books app to convert MP3 files to audiobooks. As a media player, media library, Internet radio broadcaster, and file manager, iTunes/Apple Books app has a wide range of fantastic features. For example, it enables you to burn audiobooks to CDs, sync media files, and convert audio files.
In brief, iTunes or Apple Books app can be regarded as a free MP3 to audiobook converter. It can directly convert MP3 to Apple audiobook format M4B or M4A ( (M4A & M4B use the AAC codec). Here, we walk you through the detailed steps to change MP3 into audiobooks with the assistance of iTunes/Apple Books app on Windows/Mac.
Section 1. How to Make Audiobook from MP3 in iTunes/Apple Books App
Step 1. On iTunes/Apple Books app on your computer, click on 'File' > 'Add File to Library' to upload your MP3 files to iTunes. Then you can find them in the 'Music' > 'Recently Added' catalog.
Step 2. Choose an MP3 audio file and right-click on it.
Step 3. From the popup, select 'Get Info' to get detailed information about the MP3 file. Under 'Options', enable the 'Remember playback position' and 'Skip when shuffling' playback options.
Step 4. On the 'Options' section, change 'Music' to 'Audiobook' from 'Media kind'.
Step 5. Your audio files will be displayed in the 'Books' > 'Audiobooks' section under the navigation bar of iTunes/Apple Books app.
Using this method, your audio file will still be in MP3 format, which is only available for iTunes or Apple Books app. If you want to play your MP3 as an audiobook on other players, you will need to follow the steps below to convert MP3 to M4B audiobooks.
Section 2. How to Turn MP3 into Audiobook as M4A/M4B via iTunes/Apple Books App
Step 1. First, add MP3 files to the iTunes or Apple Books library.
Step 2. Click on 'Music' under the navigation bar and select 'Recently Added' to locate all imported MP3 files.
Step 3. Hit the 'Edit' from the top menu navigation bar and choose 'Preferences' from the dropdown list.
Step 4. Switch to the 'General Preferences' and hit the bottom 'Import Settings' button to open a new window.
Step 5. From the 'Import Using' window, select the 'AAC Encoder' option. Then click 'OK' to confirm it.
Step 6. Select an added MP3 file from the left sidebar. Then click on 'File' > 'Convert' > 'Create AAC Version' to export MP3 to AAC files, which are encoded in M4A format.
Step 7. Right-click the M4A files and choose 'Show in Windows Explorer'. Then you can locate the destination folder that stores files on your computer. There, you can modify the M4A to M4B files manually.
Step 8. Now, all MP3 audiobooks are converted to M4B audiobooks with chapters. You can import them to iTunes or other players to play with chapters. Besides, all added files will display in the 'Audiobook' section automatically now.
Afterward, you can transfer the created iTunes audiobooks on iPhone and other Apple devices. If you want to play them on Android, you can refer to: How to Play iTunes Audiobooks on Android.
Part 5. How to Create Audiobook from MP3 via FFmpeg
If you are a tech-savvy who are comfortable with a command-line interface, FFmpeg is a tool for you to make an audiobook from MP3 audio files. It is free and allows for lossless conversion and precise control over the output.
Step 1. First, put all your MP3 files into a single folder and create a text file listing them in order.
Step 2. Start your terminal or command prompt. Then use a command like ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.m4b to merge the files without re-encoding. This will save your time and keep audio quality.
Step 3. After the conversion, use an external tagger like MP3tag to add the chapter and other metadata for the audiobook.
FYI: How to Create an Audiobook File from Several MP3 Files Using FFmpeg
Part 6. FAQs about Converting MP3 to Audiobook
Will the audio quality be preserved when converting MP3 to M4B?
Not perfectly. Converting MP3 to M4B usually means re-encoding MP3 (lossy) to AAC/M4B (also lossy), which can introduce slight generation loss. To minimize it, choose a higher bitrate (e.g., 128-192 kbps AAC) and avoid multiple conversions. If the source is Audible AA/AAX, a purpose-built tool (e.g., AudFree Audible Converter) can export to M4A/M4B while keeping original quality as much as possible.
View also: How to Change Audible Playback Speed
Can I add chapter markers when converting MP3 to M4B?
Yes, use tools that support chapters. Audiobook Binder (Mac/iPhone), AudioBookConverter (Windows) and some dedicated MP3 to M4B converters let you create chapter markers (by file, time, or cues). Many online MP3 to M4B converters don't add chapters, so check features first.
Will bookmarks and tags be retained when converting MP3 to Audiobook, M4A or M4B?
Tags/metadata (title, author, cover) can be copied or edited during conversion with apps like Audiobook Binder or AudioBookConverter. Bookmarks/playback position are saved by the player (Apple Books, Smart Audiobook Player, etc.), not the file. After the conversion, players will remember progress for the new M4B audiobook but old MP3 bookmarks don't transfer.
How much larger will M4B files be compared to MP3 files?
File size depends on bitrate × duration, not the container. At the same bitrate, MP3 vs M4B (AAC) will be roughly the same; AAC can even be slightly smaller at similar perceived quality. Chapters/metadata add only a tiny overhead (usually well under 1%).
Can I use Audacity to convert MP3 to M4B with chapters?
Yes, but partly. Audacity can export AAC/M4A (with the right libraries) but doesn't natively export M4B with chapters. For a true MP3 to M4B converter with chapters, use Audiobook Binder (Mac/iPhone) or a Windows M4B converter instead.
Can I combine multiple MP3 files into one M4B audiobook?
Absolutely. Combine MP3 to M4B audiobook in one go with Audiobook Binder (Mac/iPhone) or Windows tools like AudioBookConverter/M4B Converter+.
Why Is My MP3 to M4B Audiobook Not Showing up in My Library?
The most common reason is an incorrect setting for the 'Media Kind' tag. If the file is still tagged as 'Music', it will appear in your music library. Also, please ensure that the file has not been set to 'Hidden' in your settings, and confirm that the synchronization between your computer and mobile device has completed successfully.
In Conclusion
In summary, converting your MP3 files into a dedicated audiobook format like M4B is a great way to add features like chapter support and bookmarks. By doing this, it is easier to listen audiobooks on devices like iPhones, Macs, and Androids.
This post has offered many ways to do this, ranging from using built-in apps like iTunes or the Apple Books app to free, dedicated desktop programs like Audiobook Binder and AudioBookConverter. If you prefer not to install any software, several online converters can get the job done, though they often have limitations on file size or features. For a more professional solution that offers advanced features like lossless re-encoding and batch processing, tools like AudFree Audio Capture are excellent choices.
No matter which method you choose, you'll be able to transform your MP3 collection into organized, easy-to-use audiobooks.
Ivan Scott
Staff Editor
