Getting a finished audiobook to listeners.
An audiobook cover should be square. A 3000 x 3000 px RGB JPG meets the size rules of ACX, Spotify, Apple Books, Google Play and Kobo, as of November 2026.
Audiobook marketing for indie authors rests on free review codes, short audio clips and deals on sites like Chirp. Each store sets its own limits.
ACX is Audible's self-publishing service for audiobooks. You narrate or hire a narrator, then sell on Audible, Amazon and Apple Books. Its three deals compared.
As of October 2026, Spotify, Kobo and Google Play Books accept AI-narrated audiobooks with a disclosure. ACX, the route to Audible, still requires a human narrator.
Upload a chapter, give every character a voice, and listen. Free during early access, no credit card required.
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