EPUB to M4B Converter with Real Chapter Markers
Not a giant MP3. A proper M4B audiobook with embedded chapters, resume support, and correct metadata, generated from your EPUB in minutes.
Try free, no credit cardFirst audiobook free (under 100k words). After that, pay per file; no subscriptions.
If you have tried converting an ebook to audio before, you have probably ended up with a single multi-hour MP3: no chapters, no way to skip around, and a player that loses your place. The M4B format exists to fix exactly that, and producing a correct M4B is the entire point of LibriTalk.
Upload a DRM-free EPUB, pick one of 10 neural AI voices, and you get back an M4B whose chapter list matches your book's table of contents. It is built for the apps audiobook listeners actually use: BookPlayer, Smart AudioBook Player, Prologue, Plex, Audiobookshelf, and Apple Books.
The file is yours. Download it, keep it forever, and organize it in your own library. LibriTalk deletes its copy 48 hours after delivery.
How it works
- Step 1
Upload the EPUB
LibriTalk parses the EPUB's internal structure (chapters, titles, reading order) and shows you a free word-count preview.
- Step 2
Confirm the chapter breakdown
Non-narrative sections like the table of contents and copyright page are excluded automatically, so they do not end up narrated or on your bill.
- Step 3
Select a voice
Ten AI voices, US and British accents, male and female. Each has a playable sample so you can hear it on real prose first.
- Step 4
Get a true M4B
The output is AAC audio in an M4B container with embedded chapter atoms and metadata; title and author are carried over from the EPUB.
What makes a real M4B different
M4B is an MPEG-4 audio container from the same family as M4A, with two additions that matter to audiobook listeners: embedded chapter markers, and a media type that tells players this is an audiobook rather than music. That media-type flag is why audiobook apps shelve the file correctly, why players remember your position when you stop, and why your phone will not shuffle chapter 7 of your novel into a music playlist.
LibriTalk writes each EPUB chapter as a named chapter atom in the M4B, sets the audiobook media type explicitly, and embeds the book's title and author. In practice that means the file behaves identically to an audiobook you would buy: a navigable chapter list, scrubbing within chapters, and resume-where-you-left-off in every mainstream player.
Tested player support includes BookPlayer on iPhone, Smart AudioBook Player and VLC on Android, Prologue (the Plex audiobook client), Audiobookshelf for self-hosted libraries, and Apple Books on macOS and iOS. One Apple-specific note: getting a personal M4B into the iPhone's Books app requires a sync from a Mac (Finder) or Windows PC (iTunes or the Apple Devices app), so for a computer-free workflow we recommend the free, open-source BookPlayer instead.
What it costs
Your first audiobook (under 100,000 words) is free; no credit card required. After that, you pay once per book. No subscription.
Word counts are measured after non-narrative sections (table of contents, copyright pages, indexes) are excluded. See the exact count for free before you pay. Full pricing details
Frequently asked questions
What's the difference between M4B and MP3 for audiobooks?
MP3 is a plain audio format with no chapter support, so a converted book becomes one long file. M4B embeds named chapter markers, carries an audiobook media type, and supports resume. Players treat it as a book, not a song.
Will the M4B chapters show real chapter titles?
Yes. Chapter names come from the EPUB's own navigation, so your player shows 'Chapter 12: The Long Road' rather than 'Track 12'.
Does the M4B work in Apple Books?
Yes for playback: Apple Books files it under Audiobooks with the full chapter list and speed control. But iOS cannot import a personal M4B on the phone itself; you must sync it from the Books app on a Mac, or iTunes / Apple Devices on Windows. For importing directly on the iPhone with no computer, use the free BookPlayer app.
Can I put the file in Plex or Audiobookshelf?
Yes, the M4B works in self-hosted libraries. Audiobookshelf reads the embedded chapters and metadata directly, and Prologue plays it from a Plex server with chapter navigation intact.
How much does an EPUB to M4B conversion cost?
First book under 100,000 words: free, no card required. After that, $0.99 (₹89) for books under 100,000 words, $2.49 (₹229) up to 250,000 words, and $4.99 (₹449) beyond. No subscription.
What audio quality is the M4B?
AAC audio generated at 24 kHz: crisp spoken-word quality at a file size that keeps even very long books manageable on a phone.
Related
Try it on your first book, free
Your first audiobook under 100,000 words costs nothing. No credit card required.
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