EPUB to Audiobook — your KDP book in your listeners' ears
Already shipped on Kindle? Audibloom takes the same EPUB you submitted to KDP and produces an ACX-ready audiobook — preserving chapter structure from your existing TOC, applying multi-character voices, and exporting an M4B you can list on Audible, Apple Books, Spotify, and Kobo.
- 01Prologue: The Orchard at Night12:41 rendered
- 02Eleanor finds the letter38:12 rendered
- 03The harbor master speaks24:09 rendering
- 04A bargain at dawn47:33 queued
- Studio · AriaNNarrator1284 lines
- Studio · JuneEEleanor412 lines
- Studio · RonanHHarbor Master198 lines
EPUB-aware, by design
The fastest path from KDP to audiobook
Because EPUB is structured, Audibloom skips the cleanup phase entirely and goes straight to casting and rendering. Most KDP books are ready to generate in under a minute.
Reads EPUB OCF structure natively
EPUBs are structured zips of XHTML. Audibloom parses the spine and TOC directly, so chapter order and titles match your published book exactly — no manual chapter setup.
Preserves your existing TOC
Your KDP TOC becomes the audiobook's embedded chapter markers. Listeners can skip to any chapter from Audible, Apple Books, or Spotify Audiobooks just like they would in your ebook.
Cover art reused automatically
Audibloom uses the cover image embedded in your EPUB as the M4B cover. No second upload, no need to resize.
Auto character casting
Same multi-character narration as the novel pipeline: dialogue is detected, characters are cast with distinct voices, and you can override anything before generation.
Per-book pronunciation dictionary
Lock pronunciations for character names and made-up words. Reuse the dictionary across every book in a series — your AI narrator stays consistent.
ACX, Spotify, Apple Books, Kobo ready
Output is a chaptered M4B with cover art, LUFS-normalized to ACX targets. Drop it into your favorite distributor — no extra mastering required.
How it works
From manuscript to ACX-ready audiobook in four steps
Upload your manuscript
Drop in a PDF, EPUB, DOCX, or TXT file. We auto-detect chapters and split dialogue from narration.
Cast your voices
Pick a narrator and assign distinct voices to each character. Preview any line before you commit.
Generate & preview
Hear the first 5 minutes free. Re-render any chapter without re-rendering the whole book.
Export ACX-ready M4B
Get a chaptered M4B with cover art, plus per-chapter MP3/WAV — ready for Audible, Spotify, Apple Books, Kobo.
Pricing
Plans built around how authors actually publish
Subscribe by the month if you ship audiobooks regularly. Pay once if you don't. Either way, M4B export and ACX-ready mastering are available — without enterprise pricing.
Free
See how your book sounds in two minutes.
5 minutes / month
Try free- 5 minutes of generated audio
- Upload PDF / EPUB / TXT
- 6 starter voices
- MP3 download (watermarked)
- M4B export
- Multi-character narration
Creator
Short stories, blogs, and serial chapters.
2 hours / month
Start with Creator- 2 hours of generated audio
- MP3 export, no watermark
- 20+ standard voices
- Auto chapter detection
- M4B export
- Multi-character narration
Author Pro
For self-publishing a full novel on Spotify, Apple Books, Kobo.
10 hours / month
Start with Author Pro- 10 hours of generated audio
- ACX-ready M4B export LUFS-normalized, chapter markers, cover art
- Multi-character narration auto character detection + per-character voice casting
- Pronunciation dictionary IPA + per-book name overrides
- Full chapter re-generation
- MP3 + WAV per chapter
- Voice cloning
Studio
For prolific authors and small presses publishing across multiple titles.
30 hours / month
Talk to Studio team- 30 hours of generated audio
- Everything in Author Pro
- Voice cloning 3 cloned voices, 5–60s sample
- Batch projects Run 5 books in parallel
- Commercial distribution license
- Priority render queue
Per-book Pack
One-and-done. Pay only when you have a book to ship.
- Up to 12 hours of audio per book
- ACX-ready M4B export
- Multi-character narration
- Pronunciation dictionary
- No subscription, no monthly cap
FAQ
Questions, answered
What EPUB versions do you support?
Both EPUB 2 and EPUB 3 are supported. We read the OCF container, the spine in content.opf, and the navigation document (toc.ncx for EPUB 2, nav.xhtml for EPUB 3) to detect chapter structure.
Will the audiobook have the same chapter order as my Kindle book?
Yes — chapter order, titles, and any embedded sections come straight from your EPUB's spine and TOC. The M4B chapter markers match your ebook reading order exactly.
What about EPUB books with images, footnotes, or sidebars?
Images are skipped (audiobook listeners can't see them). Footnotes default to skipped but can be configured to read inline as parenthetical asides. Sidebars and pull quotes are handled the same way — read in context or skipped per your preference.
Can I use my MOBI file instead?
KDP gives you both EPUB and MOBI when you publish. Audibloom uses the EPUB. If you only have MOBI, free tools like Calibre convert MOBI → EPUB in seconds before upload.
Can I update the audiobook if I revise the EPUB?
Yes. Re-upload the new EPUB, and Audibloom diffs against the previous version — only re-rendering the chapters you actually changed.
Get early access
Audiobook your KDP backlist in beta
Already publishing on Kindle? Send us your EPUB and we'll generate the audiobook in early access — keep the result, no obligation.
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