Complete guide

What can you do with Gutter?Gutter, a professional AI book formatter

Gutter typesets your Word file for Amazon KDP and lets you fine-tune any detail just by asking. Here's everything it can do, how to ask for it in your own words, and what it doesn't do, so you know before you upload anything.

Getting started What it does on its own Typography and paragraphs Trim size and margins Drop caps, running headers and page numbers Title page, copyright and table of contents Images A specific sentence or word Novel, poetry, thesis and illustrated Amazon KDP and ePub Downloads, payment and edits RAE professional formatting

How it works, in three steps

Upload your Word file

Upload your manuscript (.docx) and choose your book type and trim size. Gutter analyzes it and typesets the whole thing, free and with a watermark.

Ask for changes

In the chat, type what you want to change, in your own words: “make the headings bigger”, “put the page number in the corner”. You see it instantly in the preview, and you can undo it.

Download your book

When you're happy with it, pay and download the print-ready PDF and the ePub, watermark-free and validated for Amazon KDP.

Everything you can do, by topic

Getting started6 ANSWERS

The basics of getting your book typeset: what to upload, what you see before paying, and how to request changes.

What file do I need to upload, and how should my Word document be formatted?→Can I preview my typeset book before I pay?→How do I ask Gutter to make changes to my book?→Can I undo a change or fine-tune it?→What languages can I use in the chat?→What if I edit my Word file after seeing the preview?→

What it does on its own6 ANSWERS

Before you ask for anything, Gutter has already read your Word file and done part of the work. Here's what it does on its own.

How does Gutter know what's a chapter, a subheading or a dedication?→What is “RAE professional formatting” and does it change my text?→What happens to the footnotes and tables in my Word file?→What if my Word file already has a title page, copyright page or table of contents?→Does Gutter warn me about copy-paste errors in my Word file?→Can the AI change any words in my book?→

Typography and paragraphs8 ANSWERS

Just ask for typography changes in plain words. You can change the body text, any type of heading or the whole book at once.

What fonts can I use in my book?→How do I change the font size in my book?→How do I change the line spacing and paragraph spacing?→How do I add or remove paragraph indentation?→Can I justify the text or center the headings?→Can I make headings bold, italic, underlined or a different color?→Which parts of my book can I format separately?→How do I make each chapter start on a new page?→

Trim size and margins4 ANSWERS

Until now, your book's trim size and margins decided whether Amazon accepted your file. Gutter calculates them for you and lets you adjust them.

What book trim sizes can I choose for Amazon KDP?→How do I change the margins in my book?→Who calculates the gutter margin and the spine width?→Are the margins the same on even and odd pages?→

Drop caps, running headers and page numbers4 ANSWERS

The details that make a page look professionally published: the big letter at the start, what goes at the top, and where the page number sits.

How do I add a drop cap to each chapter of my book?→How do I put the book title or author name at the top of every page (running header)?→Does the running header meet Amazon KDP requirements?→How do I change where the page numbers go in my book?→

Title page, copyright and table of contents4 ANSWERS

The first pages of a book follow their own rules. Gutter builds them for you and lets you fine-tune them.

What front matter pages does Gutter create?→How do I add or remove the table of contents in my book?→How do I change the copyright page and the dedication?→Can I change how the title and author look on the title page?→

Images8 ANSWERS

The images in your Word file are typeset automatically, and then you can place and adjust them however you like, with your mouse or through the chat.

How do I move an image to a different place in my book?→How do I resize and align an image in my book?→Can I add a border to an image or add space around it?→How do I round the corners of an image or crop it?→How do I make an image full-page or full-bleed?→Can I remove an image from my book?→What resolution do my images need for Amazon KDP?→Can I add new photos in Gutter?→

A specific sentence or word1 ANSWER

Not everything is global: sometimes you just want to change one sentence, a name or a word, and nothing else.

How do I make just one sentence or word bold or italic?→

Novel, poetry, thesis and illustrated4 ANSWERS

Every type of book has its own rules. When you upload your Word file, you pick the right one and Gutter starts from the matching layout.

How do I format a novel or nonfiction book?→How do I format a poetry book?→How do I format a thesis or dissertation?→How do I format an illustrated book?→

Amazon KDP and ePub4 ANSWERS

The goal is for Amazon to accept your file on the first try. Here's what gets checked and what you get.

What does Gutter check so Amazon KDP accepts my book?→Can I put text on my book's spine?→What kind of ePub does Gutter create, and does it work on Kindle?→What do I do with my files after I download them?→

Downloads, payment and edits4 ANSWERS

The practical stuff: what payment includes, how many changes you can request, and what happens if you're not happy.

What do I get when I pay?→How many changes can I request in the chat?→How much does it cost to typeset a book with Gutter?→What if I don't like the result?→

RAE professional formattingAUTOMATIC · INCLUDED

Gutter applies the Spanish Royal Academy (RAE) typographic conventions publishers use. It changes punctuation and spacing, never words.

What is “RAE professional formatting” and does it change my text?→

Your text and your data

Gutter doesn't touch your text. And it keeps nothing to train an AI.

Your manuscript is yours. Gutter's AI decides how your book looks, not what it says: it works on the formatting and leaves every word exactly as you wrote it.

Not a single word changesThe AI only changes formatting: typography, margins, headings, images. Your book's content isn't rewritten, summarized or proofread. The editor's counter shows it at all times: “0 words changed”.

Nothing is used to train AIWe work with AI providers under Zero Data Retention: your manuscript is processed to typeset it and is neither kept nor used to train any model, ours or anyone else's.

A Spanish company, under the GDPRGutter is a product of Tregolam Literatura, S.L. (CIF B88024146, Madrid). Your data is handled under the EU's General Data Protection Regulation.

The only visible exception is RAE formatting: it changes punctuation (quotes, dashes, ellipses), never words, and you can turn it off.See privacy policy →

Try it with your own book, for free

Upload your Word file and ask for any changes you want, just by chatting. You only pay to download it without the watermark.

Analyze your book for free →