Audiobook cover requirements by store
| Store | Size | File types | Other rules |
|---|---|---|---|
| ACX (Audible, Amazon, Apple) | 2400 × 2400 px or larger, square | JPG, PNG, TIFF | RGB, 24-bit, 72 dpi or more, under 8 MB |
| Spotify / Findaway Voices | 2400 × 2400 px or larger, square | JPG, PNG, TIFF | No borders or letterboxing; title and author legible |
| Google Play Books | 1,024 px or larger (up to 7,200), square recommended | JPG, PNG | 1:1 aspect ratio |
| Kobo | 600 × 600 px or larger, square recommended | JPG, PNG | Under 5 MB (Kobo Writing Life) |
Rules checked on 22 and 23 October 2026 against ACX, Findaway Voices (INaudio) and Google Play Books. Stores change their rules; check their pages before you publish.
ACX also requires the title and author on every cover, with no blurry or pixelated text, no Audible branding, no references to physical media, prices, running time or other stores, no barcodes or QR codes, and no book jackets. Findaway Voices checks that the title, author and series on the cover match the metadata and the opening credits exactly.
From an ebook cover to an audiobook cover
Ebook and print covers are portrait, usually around 1:1.6; audiobook covers are square. There are three ways from one to the other, and only one is reliably accepted:
| Approach | Result |
|---|---|
| Pad the sides (bars, a colour, or a blurred copy) | Rejected: ACX’s own example of a rejected cover has “borders to make a rectangle into a square”, and Findaway Voices forbids borders and letterboxing |
| Crop a square from the middle | Usually cuts through the title and the author’s name |
| Rebuild: a square of the artwork, with the title and author set again | The way designers do it, and what “Rebuild with text” does |
To rebuild, zoom into the picture and drag the square to a part without the old lettering (the sky, the figure, the texture), type the title and author exactly as they appear in your metadata, and add the narrator if you want it on the cover. Three styles (a serif, a bold sans and light capitals) are set from fonts free to use commercially (Instrument Serif and Geist, under the SIL Open Font License). Each line is sized to the largest that fits, never below a size that stays readable as a thumbnail; the colour follows the picture, with an optional soft shade behind the words.
The “Only from Audible” corner
For titles sold exclusively through ACX, Audible may add an “Only from Audible” graphic to the lower-right corner, reaching 41% of the way in: on a 2400 px cover, 984 px from the corner. ACX asks you to send a revised image if the graphic hides part of your art. The rebuild keeps text out of that triangle (and shows it), so the badge never covers your title.
A professional cover designer will do better than any tool for a book you want to stand out; this gets a correct, clean square cover from the art you already own.
Designing for a thumbnail
Most listeners first see your cover the size of a stamp. Keep the title and author large and inside the safe area (the dashed square), use strong contrast, and test it at the small sizes the tool shows. audiobook.tools is not affiliated with Audible, ACX, Spotify, Google or Kobo.