Preview book cover designs on realistic 3D book mockups with spine and back cover views.
Book covers are designed flat: one rectangle in an image editor. This tool wraps that rectangle around a book-shaped volume - front panel, spine, back cover - and renders it in the browser with perspective, so you can turn the book and inspect all three surfaces. The surprise for most users is the spine: it is a narrow vertical strip, and any artwork that reaches the front edge gets compressed into it. A cover that looks perfectly balanced when flat often breaks exactly there, with a title pushed to the fold or a color band cut short. That is what this preview is for.
A concrete input and expected output from the current implementation.
Input
Upload: cover-front.png (1800 x 2700 px) Book size: 6 x 9 in (trade paperback) Resolution: 300 DPI
Expected output
The preview renders a 3D book with the cover on the front panel at a 2:3 ratio, matching the artwork exactly: 6 in x 9 in at 300 DPI is 1800 x 2700 px, so no stretching or cropping is needed. Turning the book shows the spine and back cover joined to the front, and the spine takes its thickness from the book model, not the artwork.
A 6 x 9 in trade paperback at the standard 300 DPI print resolution is exactly 1800 x 2700 px (6 x 300 = 1800, 9 x 300 = 2700), so artwork at those dimensions maps to the front panel one pixel per printed dot. The 3D view then shows that art wrapped across the front, spine, and back as one continuous surface.
The mockup is a book-shaped volume: a front panel, a back panel, and the spine joining them. Your artwork is fitted to the front panel at the book's chosen size, so a 6 x 9 in book always shows its cover at a 2:3 ratio regardless of the image's shape. Because the spine sits between the panels, artwork that reaches the front edge continues onto it as one continuous wrap.
Drag the model to turn it, and the surfaces pick up shading as they rotate, which is what makes the mockup read as a real book. The angled view is the point: it shows how the design reads on a shelf, where the spine is seen first. Use it for overall impression; for precise alignment, judge against your flat source file, not the compressed 3D view.
No. This is a design check, not a print proof. Print services validate specific file properties - bleed, resolution, color mode, and cover-template dimensions - and a screen render verifies none of them. Use the preview to settle design questions like spine layout, then still request a physical test print for color and paper behavior.
It depends on what the tool asks you to supply: a front cover alone still produces a usable preview, but with a plain spine and back that tells you nothing about your design. For the full picture, provide the matching spine and back artwork, or a single wrap file with all three panels in it.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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