KDP Interior Formatter

Paste your manuscript, configure trim size, margins, and chapter formatting, then export a print-ready PDF that meets KDP specifications.

Format Your Book
100% Free No Login Required PDF Export KDP Ready

How It Works

Three steps to a print-ready interior

1

Paste

Paste your manuscript text or upload a .txt file. Chapters are auto-detected.

2

Configure

Choose trim size, font, margins, headers, page numbers, and front matter options.

3

Export

Generate and download your print-ready PDF formatted to KDP specifications.

KDP Interior Formatter

Paste your text and configure your book

Gutter (inside): 0.75 in · Outside: 0.5 in · Top: 0.75 in · Bottom: 0.75 in — auto-calculated based on page count

Your KDP interior is ready!

Features

Professional interior formatting for self-publishers

KDP-Compliant Margins

Gutter margins auto-adjust based on page count. Mirrored layout ensures the binding side always has proper clearance for perfect printing.

Smart Chapter Detection

Chapters are auto-detected from “Chapter” headings or --- separators. Each chapter can start on a right-hand page for a professional look.

Complete Front Matter

Half-title, title page, copyright, dedication, and auto-generated table of contents. Front matter uses roman numeral page numbers.

Headers & Page Numbers

Running headers with book title on even pages and author name on odd pages. Page numbers at bottom center or alternating outside positions.

KDP Interior Formatting Made Easy

Creating a print-ready book interior for Amazon KDP can be frustrating. This free tool takes your manuscript text and formats it into a properly structured PDF with all the specifications KDP requires — correct margins, mirrored gutter, page numbers, headers, and chapter formatting.

Choose from 6 trim sizes including the popular 6×9, 5.5×8.5, and 5×8 formats. The tool auto-calculates gutter margins based on your page count (0.75″ for under 150 pages, 0.875″ for 150–400 pages, 1″ for 400+ pages) following KDP’s official guidelines.

Frequently Asked Questions

Is this KDP interior formatter free?
Yes, 100% free with no limits. Everything runs in your browser — no account, no server upload, no watermarks.
What trim sizes are supported?
6×9 (KDP standard), 5.5×8.5 (digest), 5×8 (small), 8×10 (large), 8.5×11 (US Letter), and A5.
How are chapters detected?
The tool looks for lines starting with “Chapter ” or “CHAPTER ”. You can also use --- (three dashes on a line by itself) as a chapter separator.
Are the margins KDP-compliant?
Yes. The gutter (inside) margin auto-adjusts based on page count following Amazon’s official requirements. Outside, top, and bottom margins meet or exceed KDP minimums.
Can I use this for IngramSpark or other printers?
Absolutely. The PDF output works for any print-on-demand service. Just select the matching trim size for your platform.
Does it support drop caps?
Yes! Toggle the “Drop Cap” option to make the first letter of each chapter larger and bolder for a classic book look.

Build your entire book with Univers Studio

Book ideas, coloring pages, mazes, crosswords, templates — everything you need in one place.

See All Tools