AO3 to Audiobook: From Work Download to Full-Cast Podfic

AO3 text to speech vs a voiced cast

AO3 doesn't read works aloud itself. Its FAQ explains that downloads exist partly for accessibility: readers with vision challenges, migraines or dyslexia can open a work in an app that offers text-to-speech, and creators can't switch downloads off. So most AO3 text to speech today means a phone, browser or e-reader voice reading the whole work in one tone.

A voiced cast is different. FullCastBook assigns every line of dialogue to the character who speaks it, gives each character their own voice and keeps a narrator for the prose. Banter sounds like two people, a whispered line can be marked [whisper], and the result is a set of audio files with chapter markers, not a voice you have to keep running in a browser tab.

Personal listening vs posting

There are two very different things you can do here. One is listening privately: a downloaded work, voiced for your own ears, much as AO3 expects readers to use text-to-speech apps. Even then, respect the author. If their profile or notes ask readers not to put their work into AI tools, don't.

The other is sharing. Posting, uploading or sending audio of someone else's work makes it a podfic, and that needs the author's permission. Your own works are a different matter: they're yours to voice and post however you like, and many writers enjoy hearing their fic with a cast before the next chapter goes up.

Podfic with AI: permission, credit and tags

AO3's Terms of Service FAQ is direct: a podfic of someone else's work can be posted only with permission from the copyright owner, usually the creator. A blanket permission statement in their profile or work notes counts if you meet its conditions; otherwise ask, and say plainly that the voices are AI, because some authors who welcome podfic don't want an AI version. A refusal or no answer means no. With a yes, label the work as AI-voiced in the summary and tags, credit the author, link the original and keep it non-commercial. The wider question of who holds a book's audio rights is covered in audiobook rights.

Multi-chapter works and series

Long works are where a cast earns its keep. When a WIP updates, download the EPUB again, add it to the same project in FullCastBook and untick the chapters you already have; the characters you cast keep their voices. For a series of separate works, start each work from the same cast, so a returning character never changes voice between parts.

You can convert AO3 to audiobook on your phone, too: save the EPUB from the work's Download menu, then upload it from your phone's browser, or move it to a computer if that's easier. Exported MP3 and M4B files play offline in any audiobook or podcast app.

Posting your podfic back to AO3

AO3 doesn't host audio files. Host the MP3 elsewhere and embed or link it: AO3's FAQ lists SoundCloud, audio.com, podfic.com and archive.org among the sites it accepts embeds from, and any MP3 with a direct link can go in an HTML audio tag. Under Associations, tick that the work is a remix, a translation, a podfic or inspired by another work, and enter the original's URL; an "Inspired by" link then appears in your notes.

Tag it as podfic and say in the summary that the voices are AI-generated. For the wider picture across fandoms and archives, see fanfiction to audiobook; for EPUBs in general, EPUB to audiobook. More finished samples are in the examples.