HirayaAI
About

Convert EPUB, PDF, and TXT files you have the right to use into MP3 audiobooks

HirayaAI converts eligible EPUB, PDF, and TXT files into natural-sounding MP3 audiobooks for authors, students, researchers, professionals, and anyone working with content they own, are licensed to use, or can lawfully convert. The service extracts and prepares your text, creates a free audio preview, and generates a complete downloadable audiobook without requiring recording equipment, editing software, or account registration. Conversion is fast: the free preview is ready within seconds, and most full audiobooks finish in just a few minutes.

Natural narration Clear voices for long listening
Preview first Review the audio before purchase
Guest conversion No account registration required
Privacy focused Uploaded files are time limited
Listen anywhere

Download a standard MP3 audiobook

Your finished audiobook is delivered as an MP3 file, the widely supported format used by phones, computers, media players, car audio systems and home speakers.

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Pricing

Transparent pricing based on file length

Transparent one-time pricing, measured automatically from your file's word count.

Standard
$6 / file

For most manuscripts, reports and documents up to 150,000 words.

  • Full MP3 audiobook conversion
  • Natural narrator voice selection
  • Free audio preview before payment
  • Secure one-time checkout
  • Download link available for 7 days
Large file
$10 / file

For longer books, research files and full-length documents over 150,000 words.

  • Everything included in Standard
  • Built for longer source files
  • Same MP3 download format
  • Refund protection if conversion fails
  • Download link available for 7 days

HirayaAI uses simple one-time pricing per file—no subscriptions, seat licenses, or hidden monthly fees. When you upload a file, HirayaAI automatically reads the text and counts the total number of words to determine the correct pricing tier. Before you pay, the preview screen shows the detected word count and the exact price, so there are no surprises. Files up to 150,000 words cost $6, while files over 150,000 words cost $10.

FAQ

Frequently asked questions

Who is HirayaAI built for?
HirayaAI is built for authors, independent writers, students, educators, researchers and professionals who need to convert their own text files into listenable MP3 audiobooks. It is especially useful for manuscripts, notes, reports, study material and public domain works.
What content can I convert?
You may convert content that you own, have permission to use, have licensed for audio creation or that is in the public domain. Do not upload copyrighted books, commercial publications or private material unless you have the necessary rights. See our Terms of Service for full acceptable use requirements.
Which file formats are supported?
HirayaAI supports EPUB, PDF and TXT files. The best results come from files with selectable text, clear chapter structure and clean formatting. Scanned PDFs or image-only files may not extract correctly.
Do I need to create an account?
No. HirayaAI works as a guest conversion service. You upload a file, confirm that you have the required rights, generate a preview and then download the completed MP3 after conversion.
How fast is the conversion?
Conversion is fast. The free audio preview is ready within seconds of uploading, and most full audiobooks finish in just a few minutes. Larger files take a little longer; you can keep the page open while it works, and it resumes automatically if your connection drops.
How much does audiobook conversion cost?
Pricing is one-time per file. Standard conversions cost $6 for files up to 150,000 words. Large conversions cost $10 for files above 150,000 words. The service measures the word count during preview and displays the exact price before payment.
Can I hear the audiobook before paying?
Yes. Every eligible upload receives a free audio preview so you can review extraction quality, narrator sound and pacing before continuing with the full conversion. You can also test available voices from the home screen.
What happens if conversion fails?
If a paid conversion fails, HirayaAI refunds the order in full. This policy protects customers from paying for an audiobook file that was not successfully delivered.
How long are uploads and audiobooks stored?
Uploaded files are deleted automatically after they are no longer needed for processing. Completed audiobooks remain available through a download link for 7 days, then they expire and cannot be recovered.
How natural do the voices sound?
HirayaAI uses AI narration voices selected for comfortable long-form listening. Pronunciation and pacing can vary by source text, which is why the free preview is provided before the full audiobook conversion.