M4B Player
Open an M4B file and listen to it right in your browser, on Windows, Mac, or your phone, with its chapters, cover art, and playback speed. Nothing to install. Your file never leaves your device.
Drop an M4B to play it, or click to browse
M4B · M4A · MP3 · plays from your device, nothing is uploaded
M4B player: common questions
- How do I open and listen to an M4B file?
- Drop it on this page and it plays right away, with its chapters, cover, and a speed control. An M4B is an MP4 audio file with chapter markers, so on a Mac or iPhone Apple Books opens it too, and on other systems a media player such as VLC plays it.
- Can I play M4B files on Windows?
- Yes. Open this page in Chrome, Edge, or Firefox and drop the file; there is nothing to install. Windows has no audiobook app built in, so double-clicking an M4B often opens a music app that ignores the chapters, if it opens at all.
- How do I skip to another chapter?
- Click a chapter in the list under the player, or use the previous and next chapter buttons on either side of the play controls. Your keyboard's media keys and your phone's lock screen skip chapters too.
- Is my audiobook uploaded?
- No. Your browser plays the file straight from your device with its own built-in audio player. Nothing about the file is sent to a server, and nothing is kept after you close the tab.
- Why don't I see any chapters?
- The file has no chapter markers, so it plays as one long track. Add them to an M4B with the chapter editor, or turn a long MP3 into a chaptered M4B with "Add chapters to MP3".
- Does it remember where I stopped?
- No. The player stores nothing between visits, so note the chapter if you want to come back to it. For everyday listening, an audiobook app on your phone (such as Apple Books or BookPlayer on iPhone) remembers your place and works offline.
- Can I change the playback speed?
- Yes, from 0.75× to 2×, and voices keep their natural pitch. You can also skip back 15 seconds or forward 30 seconds.
- Which files does it play?
- M4B, M4A, and MP3. It uses your browser's own audio support, so AAC and MP3 audiobooks play in current Chrome, Edge, Firefox, and Safari. Chapters are read from M4B/M4A chapter markers and from MP3 ID3 chapters.