KDP Cover & Spine Generator

Upload your front and back cover images, add your title and author — generate a print-ready full-wrap paperback cover PDF with a single-line spine text.

🔒 100% Privacy Protected — Client-Side Only
0 Bytes Uploaded — 100% In-Browser Local PDF Generation
Step 1

Upload Cover Artwork

Front Cover Image
Drag & drop PNG/JPG or click to browse
Back Cover Image
Drag & drop PNG/JPG or click to browse
Step 2

Book Specifications

Minimum 24 pages for KDP spine text printing.
Step 3

Spine Styling

How Spine Width & Layout Are Calculated

Amazon KDP prints paperback books by wrapping a single continuous printed sheet around the interior pages. The required total wrap width equals Back Cover Width + Spine Width + Front Cover Width + 0.25" Bleed (0.125" on left and right outer edges).

Single-Line Spine Text Placement

Per standard publishing guidelines, spine title and author text run vertically down the spine on a single continuous line. For books under 24 pages, KDP recommends leaving the spine blank. For 24+ page books, this tool dynamically scales the font size to fit within the spine's safe print area with a safety buffer.

All rendering occurs in your web browser using HTML5 Canvas and pdf-lib. Your images are never transmitted to any external server, ensuring complete confidentiality for unreleased manuscript covers.

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