AI Audiobook Generator — Turn a Manuscript into Chapter MP3s
Paste your manuscript into Long-Form Studio, add a line starting with a hash and a space — # Chapter One — before each chapter, pick a voice, and generate. EasyVoice splits the script into parts, renders each part in the background, and stitches everything into one continuous MP3. When chapter markers are present, you also get one MP3 per chapter, packaged into a ZIP alongside a manifest.txt file that lists every chapter's title and duration. No microphone, no recording booth, no narrator to book, and no digital audio workstation to learn — the whole pipeline from pasted manuscript to publishable chapter files runs on EasyVoice's servers while you do something else.
This is built for self-publishing authors and back-catalogue publishers producing several titles a year, where human narration commonly runs into the hundreds of dollars per finished hour and a single correction means rebooking the narrator and re-editing the mix. AI narration behaves differently: the voice is consistent chapter to chapter no matter how many months separate your writing sessions, and fixing a mispronounced name or a typo costs a regenerate — minutes, not a studio session. You are trading a fixed per-hour narrator rate for a flat Pro subscription that covers every chapter, every revision, and every future title you produce.
How the audiobook generator works
Four steps take a manuscript from plain text to a distributable chapter ZIP.
Step 1 — Paste your manuscript
Up to 500,000 characters with catalogue voices. Long-Form Studio splits the text into parts on sentence boundaries, so a chapter never breaks mid-sentence, and shows you the full split preview before you generate. Signing in is required, but a free account is enough to reach the studio and see exactly how your manuscript will be divided.
Step 2 — Mark your chapters
A line starting with a hash and a space, followed by the chapter title — for example “# Chapter One” — tells Long-Form Studio where a new chapter begins. Deeper headings (## and beyond) are ignored on purpose, so a manuscript you already wrote in Markdown will not fragment into dozens of tiny chapters. The marker line itself is never spoken in the audio.
Step 3 — Pick a voice and a bitrate
66 voices across 9 languages, including narration-oriented voices built for extended listening. 128 kbps is the default; 192 kbps CBR is an opt-in choice for audiobook distribution spec, and either way the encode runs server-side from the lossless synthesis output rather than a re-encode of a compressed file.
Step 4 — Download the chapter ZIP
One MP3 per chapter, named and numbered from the chapter title, plus a manifest.txt file listing each chapter's title and duration — all packaged as a single ZIP download. The full stitched, single-file MP3 is available too, for platforms that want one continuous audio file instead of per-chapter tracks.
What this does not do
Long-Form Studio's scope is deliberately bounded. Here is what it does not do, stated plainly rather than discovered after you have pasted ninety thousand words.
No embedded-chapter single-file container. Some audiobook platforms ask for a single file with chapter metadata baked in rather than a ZIP of separate MP3s. Long-Form Studio does not produce that container format — if your distributor requires it, you will need a separate packaging step after downloading the chapter ZIP.
No lossless output, no loudness mastering. Output is MP3 at 128 or 192 kbps CBR, not a lossless format, and there is no loudness normalization to a specific LUFS target. If your distributor enforces a LUFS spec, run the exported files through a mastering step before submission.
No manuscript parsing. You paste plain text; there is no EPUB, DOCX or PDF import in this workflow. If your manuscript lives in one of those formats, convert it to plain text first, or use the single-document conversion path at /pdf-to-speech or /word-to-speech.
Long-Form Studio is a Pro feature. Free signed-in accounts can open the studio, paste a manuscript, and see the full split preview — part count and estimated runtime — before paying anything. The paywall fires at Generate, not at signup and not at paste. We would rather you know that before you invest an afternoon formatting chapter markers.
Will Audible and Spotify accept it?
Platform acceptance for AI-narrated audiobooks varies, and the rules are still moving. ACX — Audible's narrator portal — does not allow third-party AI narration; it requires a human narrator, full stop. Spotify Audiobooks, distributed through Findaway Voices, does accept AI-narrated titles, provided you disclose the use of AI narration in the book's description — a policy Findaway updated in February 2025. Apple Books and Google Play Books arrive through distributors like Findaway, so whichever distributor you use governs what is accepted on those storefronts. Direct sales through your own site are entirely your call. None of this is fixed: platform policy changes faster than any article can track it, so verify your target platform's live guidelines before you submit — a two-minute check that beats a rejected upload. A brief disclosure in the product description is low-friction and beats a negative review from a listener who found out after buying. For the full platform-by-platform breakdown, see our AI audiobook legality guide.
Rights and ownership
You own the audio you generate — EasyVoice does not claim rights over your content, and there is no per-title licence or royalty to pay on top of your subscription. If you narrate using a cloned voice, the reference audio must be your own consented material, and every cloned clip carries an inaudible AudioSeal watermark embedded at synthesis time. See /voice-cloning for the full consent policy and /faq#commercial-use for the complete commercial-use terms.
Pricing and limits
Free
5,000 characters a day for standard generation, full Long-Form Studio access to build and preview a split, no credit card required.
Pro — $9.99/mo
Chapter export, 192 kbps CBR, all 66 voices across 9 languages, voice cloning, and API access. Also available at $24.99/qtr or $59.99/yr.
Producing a single title and don't want a subscription? The $4.99 7-day pass covers one book's worth of generation. Full tier comparison at /pricing and /faq#pro-limits.
Related tools and guides
Which voices suit audiobook narration
Curated voice picks for novels, thrillers, and non-fiction — narrator-grade voices built for extended listening.
Is AI narration allowed? Platform by platform
ACX, Spotify/Findaway, Apple Books and direct sales — what each platform currently allows and what disclosure they require.
Two-host podcast episodes from a script
A different format for a different goal — turn an article or a written script into a two-host podcast episode.
Browse all 66 voices with previews
Listen before you commit a full manuscript to a voice — every voice in the catalog has a preview clip.
Frequently asked questions
How do I mark chapters so I get one file per chapter?▾
Start a line with a hash and a space, followed by the chapter title — for example “# Chapter One” — before each chapter in your manuscript. Long-Form Studio detects these markers and assigns one audio file per chapter; deeper headings (## and beyond) are ignored on purpose, so a manuscript already formatted in Markdown does not fragment into dozens of tiny chapters. The marker line itself is never spoken. The export gives you one numbered, chapter-titled MP3 per chapter, packaged in a ZIP alongside a manifest.txt file that lists every chapter's title and duration.
What bitrate does the export use, and is it a re-encode?▾
Long-Form Studio defaults to 128 kbps; 192 kbps CBR is available as an opt-in for audiobook distribution spec. Either bitrate is encoded server-side from the lossless synthesis output — not a re-encode of an already-compressed file. Scope is honest about what is out: no lossless output, no loudness mastering to a LUFS spec, and no embedded-chapter single-file container (the format some platforms request instead of a ZIP of MP3s) — if your distributor needs that container format, you will need a separate packaging step after export.
How long a manuscript can I actually paste?▾
Up to 500,000 characters with catalogue (Kokoro) voices — Long-Form Studio splits the manuscript into parts, generates them in the background, and stitches one continuous MP3 (plus the chapter ZIP if you used markers). Cloned and Arabic voices run a different path — a single background job capped at 50,000 characters — because they render through a separate synthesis pipeline. Either way, generation happens in the background so you are not staring at a spinner for an hour.
Will Audible or Spotify accept an AI-narrated audiobook?▾
It depends on the platform. ACX — Audible's narrator portal — does not allow third-party AI narration; it requires human narration. Spotify Audiobooks, via Findaway Voices, does accept AI-narrated audiobooks provided you disclose the use of AI narration in the book description (policy updated February 2025). Apple Books and Google Play Books arrive through distributors such as Findaway, so the distributor's current policy governs; direct sales through your own site are yours to decide. Policies change — always verify your distributor's live spec before uploading. See the full platform-by-platform breakdown in our AI audiobook legality guide.
Can I sell the audiobook I generate?▾
Yes — you own every file EasyVoice generates under a full commercial licence, including audiobooks you produce and sell. Full answer →
What do the free and Pro tiers include?▾
Free gives you 5,000 characters a day and full access to the Long-Form Studio preview; Pro ($9.99/mo) unlocks chapter export, 192 kbps CBR and all 66 voices. Full answer →
Start your first chapter
Free: 5,000 characters a day, full studio preview, no card required. Pro at $9.99/mo for chapter export, 192 kbps CBR and all 66 voices.