AudioBo

AudioBo

Turn Audio Files Into
Polished Audiobooks

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.

Download on the Mac App Store
Download Demo 1.4.3

60-minute export limit

4.9 · 225 App Store ratings — read the reviews

New Damaged MP3 check, faster Update Metadata — 1.4.2
Before
Multiple audio files
AudioBo in action
After
Final M4B audiobook
⚡ Faster than typical converters, every single time
📱 Outputs audiobooks for every Apple device
🎛️ Advanced controls for those who want full precision

Recommended by tech media

See AudioBo in Action

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.

Why M4B Matters for Audiobooks

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.

Feature
MP3 Files
Fake M4B
Proper M4B
Container format
❌ Always MP3 (no container metadata)
⚠️ M4A disguised as M4B (major_brand=M4A)
✅ True M4B container (major_brand=M4B)
Chapters
❌ Not supported
⚠️ QT only (no Nero)
✅ QT + Nero
Resume position
❌ Often missing
⚠️ Unstable
✅ Always saved
Metadata
❌ Fragmented
⚠️ Minimal
✅ Complete & structured
Device routing
❌ Lands in Music
⚠️ Unpredictable
✅ Lands in Audiobooks
CarPlay
⚠️ Limited
⚠️ No proper chapters
✅ Full integration
iPod Classic
⚠️ Buggy
❌ No chapters
✅ Fully compatible

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.

What Makes
AudioBo Unique

Before AudioBo, creating a proper M4B on the Mac meant dealing with outdated utilities, half-working Windows ports, or command-line scripts — nothing that felt native or reliable.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.

No Limits

No Forced Splitting

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.

No Re-Encoding

Edit Without Re-Encoding

Fix metadata or swap cover art without re-processing the audio. Faster, and it doesn't touch the sound.

Good Chapters

Proper Chapters

AudioBo writes chapters in both QuickTime and Nero formats, so they show up reliably in Apple Books and elsewhere.

Batch

Batch Chapter Cleanup

Clean up a messy chapter list in one go: normalize titles, fix ordering, remove junk entries, and keep everything consistent.

Export

Export Beyond M4B

Need something that "just plays" everywhere? Export to M4A or MP3 for picky players, old car stereos, and non-Apple setups.

External Chapters

Bring Your Own Chapters

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.

macOS Sequoia macOS Sonoma macOS Ventura

Made Just for Mac

Beautiful, familiar design. Drag and drop, instant previews, native controls — it works exactly how a Mac app should.

Simple

Smart, Not Complicated

AudioBo analyzes your files and applies the best settings automatically. No guessing, no mistakes — just a clean audiobook.

iPod

Perfect everywhere

Export once, enjoy everywhere. Audiobooks created with AudioBo work perfectly in Apple Books, CarPlay, and yes — even classic iPods.

Swift

Fast. Quiet. Optimized.

Built for Apple Silicon and Intel Macs. Encodes quickly, stays responsive, doesn't drain your battery.

Privacy

Private by Design

Everything happens on your Mac. Nothing is uploaded, logged, or tracked. Your files stay yours.

Accessibility

Accessibility-Ready

Respects your system preferences — including Reduce Motion, Contrast, Dynamic Text and Keyboard Control.

How Your Audiobook
Comes Together

You drop the files.
AudioBo handles the heavy lifting.

New
Try the demo →

Fetch Metadata and Chapters from Audible and Apple Books

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.

Read the full post on the blog →

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.

Turn Sidecar Files Into Real Chapters

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.

Read the full post on the blog →

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.

Try a Sample Audiobook

35 chapters, full metadata, cover art — see what a proper M4B looks like. Try the book from the demo above.

Treasure Island Cover

Treasure Island

by Robert Louis Stevenson

Duration 6h 20m
Chapters 35
Format M4B
Size 176 MB
Download M4B

Source: LibriVox Dramatic Reading — Public domain audio, free to use and share.

AudioBo vs Legacy Tools

Audiobook creation on macOS often means choosing between legacy apps and command-line tools. AudioBo bridges that gap with a modern, native approach.

Criterion
AudioBo
Audiobook Builder 2
Console tools
Modern native macOS interface
✅ Native SwiftUI app
❌ Legacy UI
❌ Terminal only
No limits on audiobook length
✅ No duration limits
❌ Max ~13 hours
✅ No limits
Protection against bloated or broken exports
✅ Built-in safe export heuristics
❌
❌ Easy to misconfigure
Smart transcoding (no re-encode unless required)
✅ Re-encodes only when necessary
❌ Always re-encodes
⚠️ Manual control
Full Apple-standard metadata (including sort tags)
✅ Complete Apple metadata support
⚠️ Partial
⚠️ Manual, error-prone
Automatic metadata import from source files
✅ Cover, book, author, series auto-detected
❌ Manual setup
❌ Manual scripting
Fetch metadata & chapters from the internet
✅ Audible, Apple Books, Google Books, MusicBrainz
❌
❌
Undo / Redo while editing
✅
❌
❌
Handling corrupted or messy source files
✅ Robust import handling
⚠️
❌ Often fails
Active development
✅ Actively maintained
❌
⚠️ Fragmented tools
Complexity of use
✅ Easy
⚠️ Medium
❌ Very high
Price
$12.99
$12.99
Free

AudioBo is built for modern macOS users who want correct M4B audiobooks, full Apple metadata, and zero surprises — without limits, scripting, or manual cleanup.

The Story Behind AudioBo

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.

The Team Behind AudioBo

Vlad

Vlad

Orso

Orso

What users think
about AudioBo

4.9 ★★★★★

225 App Store ratings across all countries · 95 written reviews

★★★★★ 🇺🇸

The best audiobook builder available for MacOS.

AudioBo is a god-send. Until recently I had been using Audiobook Builder 2, which hasn’t been updated in two years, and I was beginning to lose hope that I’d find a successor app. But it’s finally here! And it comes with a few useful features that actually make it much more convenient to use. Like no artificial limits to the length of your audiobooks. Metadata fetching also works without issue. Well worth the price, this app works wonderfully.

— RandomName76234, App Store US
★★★★★ 🇬🇭

Finally, a proper audiobook converter!

I had a pile of old MP3 audiobooks that kept ending up in the Music app instead of Books, no chapters, no resume position, nothing. Dragged them into AudioBo, it figured out the settings and everything just worked. The metadata fetch saved me a lot of manual cleanup too. Lovely app.

— Freebase6311, App Store GH
★★★★★ 🇺🇸

Make those audiobook CDs manageable!

I love this app so much for taming the chaos that is 100+ tracks of an audiobook cd, turning that mess into a single audiobook file with chapters and other metadata. Super easy to use and navigate! HUGE shoutout to Vlad the developer for immediately jumping on a report I submitted on a recent update. The issue was fixed and in the App store in just a couple of days. Just in time for a couple more audiobook cd’s to land on my desk!

— Zephyrluna, App Store US
★★★★★ 🇩🇪

Ex Audiobook Builder

I found this app by accident. I actually wanted to convert a 22-hour audiobook with Audiobook Builder and was looking for a way to join the three parts at the end. Then this app was suggested to me. One look at the developer's website and I knew: this is the app I'd been looking for on the Mac forever. A 22-hour audiobook in under 3 minutes on a MacBook Air is respectable. Handling, looks, results… worth every cent!!

— Hobufa, App Store DE · translated from German
★★★★★ 🇺🇸

Excellent, reliable audiobook creator

I was a little worried about giving this app a go since there weren’t that many reviews, but I’m so glad I took a chance on it! It’s a workhorse! It is intuitively built and thus very easy to use, and can handle very large audiobooks and small audiobooks alike. It’s surprisingly speedy and the options for audio quality are excellent. This is the audiobook creator to use, and well worth the money.

— Genie E., App Store US
★★★★★ 🇨🇦

Wow!

… 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!

— christopherwulff, App Store CA
★★★★★ 🇨🇿

The perfect audiobook builder! (10/10)

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.

— MrPavelr, App Store CZ
★★★★★ 🇺🇸

Finally, the audiobook converter I’ve been waiting for

I’ve been building a personal audiobook collection for years, and the lack of a decent MP3-to-M4B converter for Mac was always my biggest headache. Most tools I tried were either command-line nightmares or ancient apps with interfaces straight out of 2005. AudioBo is neither. …

— LaznenkoA, App Store US
★★★★★ 🇨🇿

Works perfectly

I can finally move my new audiobooks to my old iPod nano and listen to them while walking without having to carry around the silly big phone.

— Sevenjetc, App Store CZ

Read all 95 reviews →

AudioBo

Turn audio chaos into
Perfect Audiobooks

$12.99

Fast, simple, and built
for your Mac.

Download on the Mac App Store
Download Demo 1.4.3

60-minute export limit

💰 One-time purchase.
No subscriptions.
♿ Full VoiceOver and
accessibility support.
💻 macOS 14.6+
Apple Silicon & Intel.