File Convert

Convert M4R to M4B

Free online M4R-to-M4B converter — upload a M4R file and download a M4B. Fast, private, no signup.

Loading the converter…

M4R vs M4B

M4R

iPhone ringtone (AAC in an MPEG-4 container).

About M4R ↗

M4B

MPEG-4 audiobook (AAC, with chapter support).

About M4B ↗

M4R to M4B: frequently asked questions

How do I convert M4R to M4B?

Drop your M4R file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a M4B to download. No software to install.

Is the M4R to M4B converter free?

Yes. Convert M4R to M4B for free right in your browser, with no account needed to get started.

Is it safe and private?

Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.

What's the difference between M4R and M4B?

iPhone ringtone (AAC in an MPEG-4 container). MPEG-4 audiobook (AAC, with chapter support).

Related conversions

Convert M4R to: MP3 · WAV · FLAC · M4A · AAC · AC3 · AIFF · OGG · OPUS · WV

Convert to M4B from: AAC · AC3 · AIFF · AMR · APE · FLAC · M4A · MP3 · OGG · OPUS

Browse all supported formats →