M4B to AAC Converter

Convert your M4B files to AAC in seconds — free and online.
to
Select or drag & drop files to begin.

How to convert M4B to AAC?

Just three simple steps — no downloads, no hassle.
Click the “Choose files” button and upload your M4B file.

You can drag and drop it too — we’re flexible!

Choose “AAC” as the output format, then click “Convert”.

We’ll take care of the rest — it only takes a few seconds.

All done! Your file is now in AAC format.

Just download it and enjoy. Easy, right?

At a glance: M4B to AAC

🔁 Conversion: M4B to AAC ⏱ Average conversion time: 20 seconds 💳 Cost: Free 📂 Category: Audio ✳️ Extensions: .m4b → .aac 📏 Max file size: 75 MB 👩‍💻 Works on: Windows, Linux, macOS, iOS, Android

About M4B

M4B is similar to M4A but tailored for audiobooks and podcasts. It supports bookmarking, allowing listeners to resume playback from where they left off. M4B files are often used by iTunes and Apple Books for spoken-word content.

About AAC

AAC stands for Advanced Audio Coding and is a lossy audio format known for its high sound quality at lower bitrates. It’s commonly used by streaming platforms and devices like iTunes, YouTube, and iPhones. Compared to MP3, AAC offers better audio performance at similar file sizes.

Why Convert M4B to AAC with MiConv?

Because it's quick, easy, and made for people like you.

No software needed

Convert your .m4b files to .aac right in your browser — no downloads, no installs. Everything happens securely in the cloud.

Your files stay private

We never store your files permanently. Only you can access them, and they’re automatically deleted from our servers within 2 hours.

Fast, free, and effortless

Turn your M4B files into AAC in just a couple of clicks. No registration, no limits — and it’s 100% free.

More M4B conversions you can try

Explore other formats you can turn your M4B files into — it's easy!

M4B to AAC Converter Quality Rating

⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ⭐
Rated 9.68/10 based on 108154 reviews
You can rate after file conversion