AudioBo is an audiobook tool for Mac that helps you fix chapters, edit metadata, fetch book details online, and build proper audiobooks for Apple Books, classic iPods, and beyond.
Watch how AudioBo binds a messy folder of audio files into a clean, Apple-ready M4B audiobook — chapters, metadata, cover, and all.
Switching from another audiobook builder? See how AudioBo compares to Audiobook Builder and the classic Audiobook Binder.
A proper M4B container is what makes an audiobook truly "native" on Apple devices. If you just wrap MP3s without real chapter data or correct atoms, you get the usual mess: flaky playback, lost progress, and files drifting into the Music app instead of showing up where they belong in the Audiobooks section of Apple Books.
And unfortunately, that's exactly how many converters still work today.
major_brand=M4A) major_brand=M4B)
AudioBo builds real M4B containers from the ground up, writing both QuickTime (chap) and Nero (chpl) atoms to keep everything compatible. That way Apple Books, CarPlay, and even older iPods recognize the output as an actual audiobook — not a generic audio file wearing a different extension.
Before AudioBo, creating a proper M4B on the Mac meant dealing with outdated utilities, half-working Windows ports, or command-line scripts — nothing that felt native or reliable. And most tools didn't produce real M4B files at all: they reused an M4A container with no proper chapters, incomplete metadata, and resume points that often failed.
With AudioBo, creating proper audiobooks finally works the way it should.
Make one audiobook file — whether it's 20 minutes or 20 hours. AudioBo doesn't make you chop things up just to satisfy arbitrary limits.
Fix metadata or swap cover art without re-processing the audio. Faster, and it doesn't touch the sound.
AudioBo writes chapters in both QuickTime and Nero formats, so they show up reliably in Apple Books and elsewhere.
Clean up a messy chapter list in one go: normalize titles, fix ordering, remove junk entries, and keep everything consistent.
Need something that "just plays" everywhere? Export to M4A or MP3 for picky players, old car stereos, and non-Apple setups.
Already have chapters? Import them from a CUE file or a simple timestamped text file. Easy to write, easy to tweak, easy to try again.
Beautiful, familiar design. Drag and drop, instant previews, native controls — it works exactly how a Mac app should.
AudioBo analyzes your files and applies the best settings automatically. No guessing, no mistakes — just a clean audiobook.
Export once, enjoy everywhere. Audiobooks created with AudioBo work perfectly in Apple Books, CarPlay, and yes — even classic iPods.
Built for Apple Silicon and Intel Macs. Encodes quickly, stays responsive, doesn't drain your battery.
Everything happens on your Mac. Nothing is uploaded, logged, or tracked. Your files stay yours.
Respects your system preferences — including Reduce Motion, Contrast, Dynamic Text and Keyboard Control.
You drop the files.
AudioBo handles the heavy lifting.
Just drag your audio files into AudioBo to get started.
Supported formats:
MP3 · AAC · M4A · M4B · AIFF · WAV
FLAC · Ogg Vorbis · Opus · WMA · APE · WavPack
Expected outcome:
• Chapters are ordered correctly
• Text encoding issues are fixed
• Book metadata is filled in automatically
AudioBo automatically reads all available metadata from your source files, so most fields are already filled in.
You can review everything, edit any value, or add missing information.
Arrange tracks in the correct order, rename and merge chapters. Fine-tune the structure until everything feels right.
Or use bulk editing tools to clean up chapter titles and rename multiple files at once.
Select a ready-made preset or manually configure bitrate, codec, or sample rate. AudioBo uses built-in export heuristics to prevent invalid or incompatible settings based on your source files.
Use the "Vintage devices (iPod)" preset to optimize audiobooks for legacy players. AudioBo automatically chooses the best export settings, applies the correct cover size, and splits long books into parts when needed.
Export a ready-to-use M4B file with chapters and metadata.
The export process is optimized for maximum performance on Apple Silicon, fully utilizing available performance cores for fast, efficient processing.
That's it — you now have a clean, standards-compliant M4B audiobook.
Proper container, correct chapters, and complete metadata — ready to play reliably across all your favorite devices.
Works on:
macOS · iOS · Windows · Android · Linux
Got an audiobook that came in broken, unlabeled, or as one giant file? AudioBo can now fetch metadata from sources like Audible, Apple Books, and Google Books, pull in cover art and book details, and recover chapter titles when they're available — so a messy import can turn into a properly structured audiobook without a bunch of manual cleanup.
In this demo, I take a broken copy of Atomic Habits that starts out as one long file with no useful structure, then use AudioBo's Fetch Metadata feature to pull in book details and chapter data so it ends up looking like a proper audiobook instead of a random blob of audio.
Got an audiobook that's one giant file but you do have timestamps or chapter notes somewhere? Drop in a simple sidecar text file next to the audio, and AudioBo can turn it into real chapters automatically — so you can go from one long blob to a properly structured audiobook without splitting files by hand.
This demo shows how a single long audiobook file can become a clean, chaptered book just by adding a simple sidecar file with timestamps — no manual splitting, no detours through audio editors.
35 chapters, full metadata, cover art — see what a proper M4B looks like. Try the book from the demo above.
by Robert Louis Stevenson
Source: LibriVox Dramatic Reading — Public domain audio, free to use and share.
Audiobook creation on macOS often means choosing between legacy apps and command-line tools. AudioBo bridges that gap with a modern, native approach.
AudioBo is built for modern macOS users who want correct M4B audiobooks, full Apple metadata, and zero surprises — without limits, scripting, or manual cleanup.
AudioBo didn't begin as a product. It started with a simple change in how I read. When rolling power outages in Ukraine made evening reading unreliable, I shifted to audiobooks. And to save whatever battery my iPhone had left, I often listened on a vintage iPod Classic instead.
That's when the real problem showed up: many of my public-domain or previously purchased audiobooks existed only as loose MP3 files. No chapters. No resume position. Broken metadata, random folders — and on Apple devices they appeared in the Music app instead of showing up as proper audiobooks in Apple Books on iPhone, Mac and my iPod Classic.
The tools available back then didn't help much. Most converters felt dated or overly technical, and a few expected you to touch Terminal. None of them felt like something made for the Mac. Eventually I realized I simply wanted a small, native tool that stayed out of the way — so I built it.
I've been a Mac user for more than 15 years, and I've always appreciated apps that feel calm and respectful. That idea shaped AudioBo from the start: let the app handle the technical details, and let the user stay focused on their books.
My favorite part is its export intelligence. AudioBo analyzes the source files, picks sensible settings automatically, and can split long books into seamless parts so that Apple Books — and even classic iPods — treat them as one complete audiobook. And for people who like control, there's an Advanced panel with deeper options that stays quietly in the background unless you need it.
In the end, AudioBo became the tool I wanted for myself: a lightweight, privacy-respecting Mac app with no tracking, no subscriptions, and no fuss — built to make personal audiobooks behave the way they should.
197 App Store ratings across all countries · 84 written reviews
I've been using AudioBo to convert a stack of old CD rip MP3 audiobooks into properly structured M4B files with chapters, and it's been genuinely excellent. The interface is clean and intuitive: drag files in, and it handles metadata, chapter structure, and encoding without any fuss. …
Now this is a proper audiobook creation tool. It reliably sorts audiobook files (but you can override that); it finds metadata for imported books (which you can control); and it turns out well-designed single or split audiobooks to your specific specifications. Add to all of that the quick response times of the dev and you have a winning solution. Save yourself time. Buy this now.
Kudos to the developer - he crushed it. The app has a simple interface, intuitive UX, and powerful features like matching source files to books, automatically structuring the book properly, updating the cover, and so much more. I used Audiobook Builder 2 for years, and this is easily 10x better.
This app is absolutely fantastic, beautiful, and so easy to use. It has completely transformed my messy audiobook collection into a perfectly organized library. Creating M4B files is now a breeze, and I love all the smart features it offers. On top of that, the developer's support is incredible. I had a quick technical question regarding some of my older, weirdly formatted files, and Vlad replied and helped me out within hours. It’s rare to see such dedication. If I could give it 10 stars, I would! Highly recommended.
Been using a competitor's software for years and I thought it was the best available until I found this software! VERY easy to use and the developer is responsive to suggestions and feature requests. Worth every penny!
It’s taken me a long time to find an app like AudioBo, and honestly, it’s perfect. It does exactly what I need it to do without any unnecessary complications. If you’re on the fence about buying it, don’t be. Just get it. It’s incredibly easy to use, works exactly as advertised, and has made creating audiobooks so much easier for me. Genuinely one of those rare apps that delivers on its promise. Well, well, well worth the purchase. A big shout-out to the creator for making such a fantastic app!
I was prepared to convert my library to m4b manually with ffmpeg but thankfully AudioBo is here to save the day. This thing is crazy quick on my MacBook. The matching to metadata and letting me edit the chapter list is also very handy, easy, and fast.
As others have said, this is EXACTLY what I’ve been waiting for! This makes converting files so much easier: a Calibre for audiobooks. Thank you for not only creating a wonderful app, but making it a one-time purchase rather than a subscription (I wouldn’t have bought it otherwise). A very useful tool at a fair price! …
Don’t have much to add on the other reviews here. This app just does what it says better than I had even hoped. Finally got to say goodbye to the wacky stack of scripts and scrapers I was using before to manage my audiobooks. I truly threw some really messed up folders at it and it fixed them up perfectly, with new chapter markers, metadate and cover art. Well done!