Audiobook covers are a distinct product from ebook covers, and the differences matter more than most authors expect. The format is square — not the tall rectangle of an ebook or the three-panel wrap of a paperback. The context is a listening app thumbnail grid, not a browse shelf. And the technical specifications are stricter than most ebook platforms, with explicit rules about image content that can get your title pulled before release. If you are releasing your book as an audiobook through ACX, Findaway Voices, or Authors Direct, here is what your cover actually needs to look like and why.
The Square Format and Why It Changes Everything
Every major audiobook platform — Audible, Apple Books audio, Google Play, Spotify — displays covers in a 1:1 square aspect ratio. This is not negotiable and it has direct consequences for your design approach. An ebook cover at 1.6:1 portrait ratio cannot simply be cropped to square without losing either the top or bottom of the design. If you plan to release in both ebook and audiobook formats, you need to plan square-compatible composition from the start, or create a dedicated audiobook version.
The practical implication for typography is significant. In a portrait ebook cover, it is common to place a large atmospheric image in the upper portion and stack title, subtitle, and author name in the lower third. In a square cover, that approach leaves the image feeling cramped and the text competing for space in a compressed area. Audiobook cover typography typically fills a larger proportion of the square, either centered in a bold typographic treatment or integrated directly into the image rather than stacked below it.
Think of audiobook covers more like album art than book covers. The most effective ones make the title the dominant visual element and use imagery to create mood around it rather than as a backdrop that text sits on top of.
ACX Technical Requirements
ACX (the Audiobook Creation Exchange, owned by Audible and Amazon) specifies the following for cover art submission. The file must be a JPEG. The dimensions must be exactly 2400 x 2400 pixels minimum; ACX recommends 3000 x 3000 pixels for best display quality on high-density screens. The aspect ratio must be 1:1 — no exceptions. The file size maximum is 5 MB. Color mode must be RGB, not CMYK.
ACX has explicit content restrictions that go beyond the usual prohibition on trademarked imagery. The cover must not contain nudity or sexually suggestive imagery, regardless of whether your book has mature content. If your book is in a romance genre where suggestive covers are standard practice for ebook sales, your audiobook version requires a different, compliant cover. ACX will reject submissions with covers that violate these rules, and if a previously approved title is flagged later, it can be removed from sale until the cover is updated.
The cover must also display correctly in a small thumbnail — 50 x 50 pixels in some interface contexts on mobile. Test your design at this extreme reduction. If the title becomes unreadable at small sizes, the cover needs either larger text or a bolder, higher-contrast treatment.
Findaway Voices Technical Requirements
Findaway Voices (now part of Spotify) distributes audiobooks to a wide network of non-Audible platforms including libraries through OverDrive and Libro.fm. Their cover requirements align closely with ACX in most respects. JPEG format, 1:1 square aspect ratio, minimum 2400 x 2400 pixels recommended at 3000 x 3000 pixels, RGB color mode, 5 MB maximum file size. The content restrictions mirror ACX requirements for nudity and explicit imagery.
One difference worth noting: Findaway's review process for cover compliance is sometimes faster than ACX's, which means covers that pass Findaway review can still be rejected by ACX when the same title is submitted there. If you are submitting to both platforms, ACX's requirements are the more restrictive standard to design toward. Build a cover that satisfies ACX and it will generally satisfy Findaway as well.
Building an Audiobook Cover from Your Existing Ebook Cover
If you already have an ebook cover and want to adapt it to audiobook format rather than starting from scratch, the approach depends on how your ebook cover is composed. Canva makes this relatively straightforward if your original cover file is still editable there.
Open your ebook cover in Canva. Create a new design at 3000 x 3000 pixels. Copy your main image element and resize it to fill the square canvas — you will likely need to zoom in on the image and accept that some of the original photo is cropped out. This is usually acceptable because the central subject of the image (a figure, a face, an object) can be centered in the square. The compositional problem comes when your ebook cover relies on a wide landscape that loses its atmosphere when cropped to square. In those cases, a new background image works better than cropping.
For the typography, resize your title to be larger relative to the square canvas than it was on the portrait cover — the square format requires more visual weight in the text to feel balanced. Author name typically moves to a position below the title rather than at the bottom of the image, and subtitle text is often dropped entirely or reduced to a very small size to keep the composition clean at thumbnail dimensions.
Designing a Strong Audiobook Cover from Scratch
If you are starting fresh, the clearest brief for an effective audiobook cover is: make the title readable at 100 pixels wide. Everything else serves that goal. A clean, high-contrast background — whether a solid color, a simple gradient, or a single strong photographic element — gives the title text room to dominate. A large, bold, high-contrast font in a color that reads against the background is the minimum viable design. Simple works better than complex at square thumbnail size because detail disappears and only silhouette and contrast survive.
Successful audiobook covers in popular genres follow recognizable patterns. Thriller audiobooks often use dark backgrounds, uppercase sans-serif titles in white or red, and a single dramatic element — a face in shadow, a cityscape, a weapon. Romance audiobooks often use warm tones with a couple or a single figure and a script title font. Non-fiction audiobooks favor the author name at near-equal size to the title, with a clean abstract background that reads as authoritative rather than atmospheric.
Whatever approach you take, test the finished design at 50 x 50 pixels before submitting. Export the file, open it in an image viewer, and resize the window to display it very small. If the title is still legible — even just recognizable as a word — your cover will hold up in listening app interfaces. If it turns to visual noise at that size, increase font size or contrast before uploading.
One Cover File for All Audiobook Platforms
Build one master file at 3000 x 3000 pixels, 300 DPI, saved as a high-quality JPEG. This single file will meet the submission requirements for ACX, Findaway Voices, Authors Direct, and every other major audiobook distribution platform. There is no platform-specific variant needed the way there sometimes is for ebook files. Export at maximum JPEG quality and verify the file size is under 5 MB — at 3000 x 3000, a maximum-quality JPEG will typically be between 2 and 4 MB, which is within limits.