Audio conversion
Convert WAV to M4B
WAV is raw, uncompressed audio, the kind you get straight off a recorder. M4B is the audiobook format, built for spoken-word listening with chapters and a bookmark that remembers where you stopped. To convert WAV to M4B, open a converter, choose M4B as the output, and export. It happens on your own computer, so the recording never uploads anywhere.
All 2,748 conversions verified on macOS, Windows, and Linux against the shipping release, this one included. Every conversion runs entirely on your own computer.
- Extension
- .wav
- Type
- Audio
- Typically
- Uncompressed audio, recording
- Extension
- .m4b
- Type
- Audio
- Typically
- Audiobooks, podcasts
- Compression
- Lossy
Convert WAV to M4B on your own computer. Nothing uploads.
One-time purchase, no subscription. 14 days to change your mind.
How to convert WAV to M4B
- Open Morphjet and drag in the WAV file, or a whole folder of recordings, that you want to convert.
- Choose M4B as the output format.
- Convert. The M4B file is written next to your original, and nothing leaves your machine.
WAV vs M4B: what actually changes
| WAV | M4B | |
|---|---|---|
| File size | Large, uncompressed | Much smaller, compressed for speech |
| Quality | Lossless, full fidelity | Lossy, but generally transparent for spoken word at normal listening |
| Chapters and bookmarks | No | Yes, apps remember where you left off |
| Opens everywhere | Plays in nearly any audio app | Opens in audiobook and podcast apps |
| Best for | Recording and editing | Long-form listening and audiobook distribution |
When to convert, and when not to
Convert WAV to M4B when you've recorded an audiobook, podcast episode, or lecture and want to distribute it in a format built for long-form listening, with chapters and a saved playback position.
Keep the WAV original if you're still editing or mastering the audio, since M4B compresses the sound and that step is easier to redo from an uncompressed file.
Why not just use an online converter?
A WAV recording can be a private conversation, a narration in someone's own voice, or an unreleased chapter, and an online converter means that audio sits on a stranger's server, at least briefly, before you get the M4B back. Converting on your own computer keeps the recording local the whole time, with nothing uploaded and no account required.
Questions
Does converting WAV to M4B lose quality?
Yes, M4B uses lossy compression, so there's some quality loss. For spoken word at normal listening volumes it's generally not noticeable, but if the WAV is music or something you want to preserve exactly, keep the original.
Will the M4B keep chapter markers?
M4B supports chapters, but a single WAV file doesn't contain any to begin with, so a straight conversion produces one continuous track. Chapters have to be added separately if you want them.
Is M4B better than MP3 for audiobooks?
For audiobooks, yes in one practical way, M4B remembers your playback position across the file the way MP3 usually doesn't, so listening apps pick up right where you stopped.
Can I convert WAV to M4B without uploading the file anywhere?
Yes. A desktop app like Morphjet converts the file on your own computer, so the recording never travels over the internet.
Morphjet runs this conversion and 2,747 others, all on your machine. Available now.
One-time purchase, no subscription. 14 days to change your mind.