Three steps. PDF to audiobook.
Upload PDF
Drop your PDF file. AI extracts text, reads the document outline to detect chapters, and identifies characters automatically.
Cast Your Characters
Pick from 550+ AI voices. Assign a different voice to the narrator and each character. Preview before you commit.
Generate Audiobook
Hit generate. Download chapter-by-chapter MP3 files or a single audiobook. Ready for Audible, Apple Books, or anywhere.
What you get
From PDF to audiobook
Traditional audiobook production is expensive. A professional narrator charges $2,000–$5,000 per finished hour. A 10-hour audiobook can cost $20,000–$50,000 before distribution. Add studio rental, editing, mastering, and weeks of scheduling. Most indie authors never recoup that investment.
AI changes the math. Upload your PDF, pick voices, and generate a complete audiobook in minutes. Not hours. Not weeks. Minutes. The cost drops from thousands of dollars to a monthly subscription. And you keep 100% of your royalties.
This matters most for indie authors and self-publishers. You already wrote and laid out the book. You already have a print-ready PDF sitting on your desktop. Now you can turn that same PDF into an audiobook without hiring anyone, booking a studio, or waiting for a narrator's schedule to open up. Your PDF is the audiobook — it just needs a voice.
Character voice casting
Great audiobooks don't use one voice for everything. They cast voices — the gruff detective, the nervous sidekick, the calm narrator tying it all together. That's what Notevibes does automatically.
When you upload a PDF, the AI extracts the text and scans for dialogue tags like “she said” and “he whispered.” It identifies characters by name, maps who speaks each line, and suggests a voice for each one. You review the cast list, swap voices if you want, and hit generate. Every line of dialogue plays in the right voice. Narration stays consistent.
This is the difference between a flat text-to-speech reading and an actual audiobook. Characters sound like characters. The narrator sounds like a narrator. Dialogue feels alive. Your listeners can tell who's talking without reading attribution tags — just like a professionally narrated book.
Automatic character detection
AI finds characters from dialogue and attribution tags in your PDF.
Voice casting panel
Review all detected characters. Assign, preview, and swap voices in one screen.
Dialogue vs. narration
The AI knows which text is dialogue and which is narration. Each gets the right voice.
Consistent across chapters
Once you cast a voice, it stays assigned for the entire book. No drift between chapters.
Voices & Languages
Notevibes offers 550+ AI voices across 72 languages. Voices are powered by Google, Amazon, Microsoft, and OpenAI neural TTS engines — the same technology behind Alexa, Google Assistant, and Siri.
550+ voices
Male, female, and child voices. Warm, dramatic, conversational, or professional tones.
72 languages
English, Spanish, French, German, Japanese, Chinese, Arabic, Hindi, and 64 more.
Multi-voice casting
Assign different voices to narrator and each character. AI detects dialogue automatically.
Cost comparison
Traditional audiobook production vs. AI narration — for a typical 10-hour audiobook.
| Factor | Traditional Narration | AI Narration |
|---|---|---|
| Cost | $20,000 – $50,000 | From $19/month |
| Production time | 4 – 8 weeks | 10 – 20 minutes |
| Voice options | 1 narrator | 550+ voices |
| Languages | 1 language per recording | 72 languages |
| Revisions | $200+ per hour re-record | Unlimited, instant |
| Commercial rights | Negotiated per contract | Included on all plans |
| Character voices | Extra cost per actor | Built-in, automatic |
AI narration won't replace a world-class human narrator performing your memoir. But for indie fiction, non-fiction, self-help, educational content, and the 95% of books that never get a traditional audiobook deal? It's not even close.
Security & Privacy
Encrypted transfer
All file uploads use HTTPS encryption. Your PDF is protected in transit and at rest.
Auto-deletion
Source files are processed and deleted. Only your generated audio is stored in your account.
Your content, your rights
We never use your PDFs to train AI models. Full commercial rights on all paid plans.
Questions?
How do I convert a PDF to an audiobook?
Upload your PDF at notevibes.com/audiobook-narration. The AI extracts text, reads the document outline to detect chapters, identifies characters and dialogue, and lets you assign voices. Click generate and download your audiobook as MP3.
What kinds of PDFs are supported?
Notevibes supports text-based PDFs (the standard export from Word, Google Docs, InDesign, Vellum, Atticus, and Scrivener). Scanned image-only PDFs are run through OCR automatically. Password-protected PDFs must be unlocked before upload.
How long does conversion take?
A typical novel-length PDF (60,000–80,000 words) takes 10–20 minutes to generate. Individual chapters are ready in under a minute. You can preview chapters before generating the full book.
Can the AI detect characters in my PDF?
Yes. Notevibes AI scans the extracted text for dialogue tags and character names. It identifies who is speaking and lets you assign a unique voice to each character — creating a multi-voice audiobook automatically.
Will it find chapter breaks in my PDF?
Yes, when your PDF has bookmarks or an outline. Notevibes reads PDF bookmarks (the panel on the left in Adobe Acrobat) and uses them as chapter markers. If your PDF has no bookmarks, the AI falls back to detecting chapter headings from the text itself.
Can I publish the audiobook on Audible?
Yes. All paid plans include full commercial usage rights with no royalty splits. Export ACX-compliant audio (192 kbps CBR, 44.1 kHz) and upload to Audible via ACX. Also works with Apple Books, Google Play Books, Spotify, Kobo, and Findaway Voices.
Do I own the rights to the generated audiobook?
Yes. With any paid plan, you own full commercial rights to all generated audio. No royalty splits, no per-sale fees, no platform lock-in. Sell, distribute, and monetize your audiobook on any platform worldwide.
What audio quality do I get?
Audio is generated at high-quality MP3 (192 kbps CBR, 44.1 kHz) — ACX-compliant out of the box. Volume normalization, peak limiting, and noise floor control are applied automatically. No post-processing needed.
What languages are supported?
Notevibes supports 72 languages including English, Spanish, French, German, Portuguese, Japanese, Chinese, Korean, Arabic, Hindi, Russian, and many more. Each language has multiple voice options.
How is this different from just using text-to-speech?
Generic TTS reads everything in one flat voice. Notevibes detects characters, assigns unique voices, handles dialogue differently from narration, splits chapters, and exports ACX-compliant files. It creates an audiobook, not a robot reading text.
What if my book is in EPUB or Word format instead?
Notevibes supports EPUB, Kindle (.mobi/.azw3), Word (.docx), and plain text in addition to PDF. EPUB and .docx tend to give the cleanest chapter splits because their structure maps directly to chapter markers.
Your PDF, now an audiobook
Upload your PDF and hear it come alive. AI detects chapters, casts characters, and generates a full audiobook. Your book, 550+ voices, minutes to finished audio.
Create Your Audiobook550+ voices · 72 languages · Character voice casting · Full commercial rights