Turn M4B audiobooks into WAV. It is converted in your browser, so the file never leaves your device.
Drop M4B files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop M4B files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the WAV, or download everything as one ZIP if you converted several files.
The M4B to WAV converter is part of this page and runs inside your browser. Your audiobooks are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
M4B only shows chapters and bookmarks in apps that treat it as an audiobook. WAV is uncompressed, so audio editors and transcription tools accept it without fuss. An M4B file usually holds AAC with chapters. M4B is at home in audiobooks with chapters and a remembered playback position; WAV is the usual choice for recording, editing and mastering. WAV cannot bring back detail that M4B compression already removed; it simply stores the result without further loss, in a larger file.
The defaults suit most files. Under Options you can trim the start and end.
The conversion uses your browser's own video and audio codecs (WebCodecs), with hardware acceleration where the device has it; the file is read from disk as it goes and can be up to 2 GB. Where the browser lacks a codec, the page falls back to the compatibility engine.
M4B is an M4A file with a different extension, marking it as an audiobook so that players offer chapters, bookmarks and a remembered position. Inside it is ordinary AAC audio. Podcasts and audiobooks are commonly sold or shared as M4B.
Opens in Apple Books, iTunes and Music, VLC and most audiobook apps
M4B converterWAV stores audio as raw, uncompressed samples. Nothing is lost, which makes it the standard working format in audio editing, and files run to about 10 MB per minute at CD quality.
Opens in Every computer, audio editor and most phones
WAV converter| M4BAudiobook | WAVWAV audio | |
|---|---|---|
| Stands for | MPEG-4 audiobook | Waveform Audio File Format |
| Type | Audio | Audio |
| Compression | Lossy (AAC) | None (uncompressed PCM) |
| Usually contains | AAC with chapters | PCM |
| Introduced | The 2000s, by Apple | 1991, by Microsoft and IBM |
| Opens in | Apple Books, iTunes and Music, VLC and most audiobook apps | Every computer, audio editor and most phones |
| Best for | Audiobooks with chapters and a remembered playback position | Recording, editing and mastering |
| File extension | .m4b | .wav, .wave |
No. The M4B to WAV conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Nothing more is lost: WAV is uncompressed, written as 16-bit audio, the same as a CD. It cannot restore what M4B compression already discarded, and the file will be larger.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the M4B file, press Convert and save the WAV. There is nothing to install.
Yes. Files up to 2 GB are accepted. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.