Book formatting
Format Your Paperback Interior
The inside of the book, done to trade standards — so your paperback reads like it came from a publisher.
Readers can't name what makes a paperback interior feel professional, but they notice when it's wrong: text too close to the spine, chapters starting on the left page, headers on chapter openers, rivers of white in badly justified text. Ceeryo applies the trade conventions automatically — mirrored margins with a spine-side gutter, chapters opening recto with the running head suppressed, drop folios, widow and orphan control, hyphenated justification — because they're built into the themes, not left as settings.
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Last updated: August 5, 2026 · Reviewed by the Ceeryo team
You'll confirm chapters, title and front matter before anything is set. Your words never change — only the typography.
Real output
What the typeset pages actually look like
Chapter opener and body page from each interior theme — rendered from the engine's real output at 6×9, not mockups.
How it works
From manuscript to book in four steps
The fastest way from a finished Word manuscript to print-ready files — no templates, no desktop app, no per-page fiddling.
- Step 1
Upload your manuscript
Drop in the .docx manuscript you have finished writing. Your file is processed only to typeset it and is never used to train models.
- Step 2
Chapters are detected
Chapter openings, scene breaks and italics are found automatically, without changing a word of your text.
- Step 3
The book is typeset
Trim size, margins and gutter, running heads, drop caps and chapter openers are set as a real book interior.
- Step 4
Download print PDF + EPUB
A print-ready interior PDF at your chosen trim size plus a clean EPUB, checked against the geometry KDP enforces.
In short
A professional paperback interior follows trade conventions: mirrored margins with a gutter that grows with page count, chapters opening on the right-hand page, no running head on opener pages, and controlled justification. Ceeryo applies all of them automatically from your Word manuscript.
Why do chapters start on the right-hand page?
It's the trade-publishing convention (a 'recto' opener): the right page is what the eye lands on when flipping through, so chapters open there, with the running head suppressed and often a drop folio. When the previous chapter ends on a right page, a blank left page is inserted — Ceeryo handles that, and keeps the blank page truly blank.
The details readers feel
Conventions, encoded
Every rule a trade compositor would apply is in the engine: opener pages without headers, blank versos kept clean, first paragraphs unindented after openers and scene breaks, folios that don't appear on front matter. You don't configure them; they're simply how the output is built.
Features
Why authors choose Ceeryo
Spread-aware margins
Inside and outside margins mirror across left/right pages with the gutter on the spine side.
Opener conventions
Recto openers, suppressed heads, drop folios, clean blank versos.
Justification control
Hyphenation plus widow/orphan rules keep the text block even.
Use cases
Where Ceeryo works best
KDP or IngramSpark paperback
Meet the interior specs both platforms check.
Upgrading a Word-exported PDF
Replace a homemade interior that never looked right.
Publisher-grade proofs
Query with sample chapters that look typeset, not typed.
Why not do it by hand?
Ceeryo vs. doing it manually
Typesetting a book by hand in Word or InDesign takes days and rarely passes KDP's checks the first time. Here's the difference.
Output quality
What the finished book files look like
Every run produces a preflight-checked print PDF and a clean EPUB — never a rewrite of your words. Here's what you get.
- Mirrored margins with page-count-correct gutter
- Recto chapter openers with clean blank versos
- Drop folios and suppressed opener heads
- Even, hyphenated justification without rivers
Topic cluster
Related book formatting tools
Other ways to turn your Word manuscript into a finished book.
Format Your Book for Amazon KDP in Minutes
Upload your .docx manuscript, pick a trim size and interior theme, and download a print-ready PDF that passes KDP's checks — plus an EPUB for the Kindle edition.
printbookformatterTurn Your Manuscript into a Print-Ready PDF
From double-spaced draft to typeset book interior — trim size, margins, chapter design, and preflight in one pass.
printbookformatterKDP margin checker
Every margin calculator repeats Amazon's table. The question that gets books rejected is whether your PDF actually meets it.
printformatterWord count to book pages — measured, not estimated
Most words-per-page tables are guesses. These numbers come from actually typesetting manuscripts at each trim size.
bookformatterBook Formatting Software That Runs in Your Browser
Everything the desktop formatters do for a novel — trim sizes, margins, chapter design, EPUB export — without installing or learning anything.
bookformatterFormat Your Manuscript as a 6×9 Book
6×9 in is the standard trade-paperback trim. Upload your Word manuscript and get a 6×9 interior PDF with the margins and gutter exactly right.
bookformatter
Frequently asked questions
What's a gutter and why does it grow?+
The gutter is the extra inside margin swallowed by the binding. Thicker books curve more at the spine, so the required gutter grows with page count — from 0.375" under 150 pages to 0.875" near 828 on KDP. It's computed from your real page count here.
Do you handle front matter?+
A title page and copyright page are generated from your book's metadata, kept unnumbered, and the story starts on its own right-hand page.
Hardback too?+
The same interior PDF works for KDP hardcover at matching trims; case-laminate covers are a separate file (not an interior concern).
Format your paperback
Upload your manuscript and download a trade-standard interior.