FullCastBook

FullCastBook turns a manuscript into an AI audiobook with a full cast. Upload an EPUB, PDF, DOCX, TXT or Markdown file, or paste a chapter, and it finds the chapters, works out who is speaking in each line and gives every character a distinct voice alongside an AI narrator. Swap any voice from a library of standard and premium voices, and keep the same cast across a series. Direct any line in plain English by adding a note in brackets, such as [whisper, like sharing a secret], and drop sound tags like [laugh], [sigh] or [breathe] exactly where they belong. Regenerate a single line without redoing the chapter, then export the finished audiobook as one M4B with chapter markers, MP3 files or a ZIP. It also works for two-voice podcasts and dialogue, audio drama, bedtime stories and book trailers. Signing up is free with no card; audio is paid with credits from a plan or a one-time top-up.