Turn a book or long document into an audiobook, chapter by chapter

Why a chat assistant will not make you an audiobook

Voice features in chat assistants are made for conversation. They read a reply out loud while you listen, but they do not give you an audio file, and a long text pasted into a chat is cut off or summarized long before the end of a book. Getting a 90,000-word manuscript into audio that way would mean hundreds of rounds of copy, play and record.

This tool reads the file itself. It finds the chapters, splits each one into parts of about 2,500 characters at paragraph and sentence breaks, has every part read by a text-to-speech model, and joins the parts of each chapter into one MP3 without re-encoding them. Each part appears on screen as soon as it is ready, so you can listen while the rest is still being read.

What people use it for

• Authors listening to their own manuscript to catch awkward sentences, or sharing a draft with beta readers
• Students turning course readings, theses and long reports into something to listen to on the way
• Public domain books that never had an audiobook edition
• Long articles, newsletters and documentation for listening instead of reading
• Texts in languages with few audiobooks available, such as Persian

Preparing the file

EPUB and Word files give the best chapters: each EPUB section, or each Heading 1 or Heading 2 in Word, becomes a track. In plain text and PDF, lines such as "Chapter 7", "CHAPTER VII", "Part Two", "Prologue" or a Markdown heading start a new chapter; without them the text is read as one long track. Very short sections such as a cover page are joined to the next chapter.

PDFs are read from their text layer. Page numbers, running headers and footnotes in a PDF are part of that text and may be read aloud, so an EPUB or DOCX of the same book usually sounds cleaner. Scanned PDFs without a text layer cannot be read; convert them to text first.

The voice and its limits

Every job is read by one AI narrator voice. It handles normal punctuation, dialogue and paragraphs, but it does not act out different characters, and unusual names, abbreviations and numbers may be pronounced in unexpected ways. Listen to the free opening in your language before paying.

Ebooks with copy protection from online stores cannot be opened. Use the tool for texts you wrote or have the right to turn into audio.