Best Book Formatting Software 2026: Complete UK Roundup

In brief. Nine tools, rated on four things you can act on, with the number nobody else publishes: how many copies you have to sell to pay for each one. Every price is the vendor’s own with the date we checked it — not a converted figure that went stale months ago.

Last reviewed by Robert Prime — 2 September 2026

The distinction that makes this page make sense

Most formatting roundups list Atticus, Vellum, Calibre and Sigil in one table as if they competed. They do not. There are three different jobs here, and buying the wrong category is the most common way an author wastes an afternoon:

A conversion tool cannot design a page. A layout tool cannot repair broken EPUB markup. If your file is rejected by KDP, you need the third category, not the first. Our Calibre vs Sigil comparison covers that pair in depth, and EPUB validation errors covers what to do when a file fails.

How to read this page

Four ratings, one to five, plus the arithmetic.

The break-even basis. A £2.99 ebook at Amazon’s 70% royalty earns about £2.09 a copy. A $2.99 US ebook earns about $2.09. So a $147 tool costs you 71 copies, once.

A note on currency, because this is where these pages go wrong

Most formatting tools are priced in US dollars. A previous version of this page converted them to pounds, which meant that within a few weeks it was quoting prices no reader would see at checkout.

So from this revision: we print the currency the vendor prints. Where a vendor genuinely prices in sterling — Scrivener and Nielsen do — you will see a pound sign, and it is their number, not our sum. Where a vendor prices in dollars you will see a dollar sign, and what you actually pay depends on the rate and your card’s fees on the day.

Tier one: layout tools worth paying for

1. Atticus

Impact 4 · Difficulty 2 · Technical 2 · Budget $147 once

The safe default for most authors, and the only paid tool here that runs on everything — Windows, Mac, Linux and Chromebook. It writes and formats in one place, so it removes the export-import shuffle between a writing app and a layout app.

Verified from Atticus, 2 September 2026: $147, one-time payment, “No monthly fees. Forever.”, all future updates included. Works offline or online.

Break-even: 71 copies, once. Against a subscription that is unusually good value, and against a one-off formatting service it pays for itself on the second book.

Where it falls short. Output is very good but not Vellum’s. Fine control over print typography is limited compared with a designer working in InDesign, which matters for illustrated or heavily-designed non-fiction and does not matter at all for a novel.

See our Atticus review and how much Atticus costs.

2. Vellum

Impact 5 · Difficulty 1 · Technical 1 · Budget $199.99–$249.99 once

The best output of anything on this page, and the easiest to use. It is also macOS only, which rules it out for a large share of UK authors before the price is even relevant.

Verified from Vellum, 2 September 2026:

Both are one-time purchases requiring macOS 13 or newer. Prices exclude tax.

The detail most roundups omit, and it is the useful one. You can download Vellum and “build, style, and preview your book” for free — you only pay when you are ready to publish. So you can load your own manuscript, see your own book laid out, and decide whether the output justifies the price before spending anything. Do that before you buy.

Break-even: Ebooks is 96 copies; Press is 120 copies, once.

On borrowing a Mac. A licence is tied to you, not the machine, and one purchase formats unlimited books. Authors do borrow a Mac for an afternoon. It is legitimate and it works.

See Vellum vs Atticus and Vellum alternatives for Windows.

3. Microsoft Word

Impact 2 · Difficulty 4 · Technical 3 · Budget you probably already own it

Not recommended, but honestly assessed: Word can produce an acceptable print PDF if you know how to use section breaks, mirrored margins and styles properly. Most authors do not, and the failure mode is silent — the file looks right on screen and is wrong at the printer.

Word has no native EPUB export, so the ebook still has to come from somewhere else.

Use it if: your book is straight prose, your budget is genuinely zero, and you are willing to learn styles properly. Otherwise: Reedsy is free and will fight you less.

Tier two: the genuinely free layout tools

4. Reedsy Studio

Impact 3 · Difficulty 1 · Technical 1 · Budget free

Browser-based, no install, and it exports both formats you need. The constraint is that it gives you a small number of clean templates rather than control — which for a novel is a feature, not a limitation.

Verified from Reedsy, 2 September 2026: the core is free — “Studio’s core writing and formatting functions are free — and they always will be” — and it exports print-ready PDF and EPUB. Paid add-on tiers exist for version history and writing statistics; we could not read their prices and have not printed any.

Best free option on this page for a standard novel or a straightforward non-fiction book.

5. Kindle Create

Impact 2 · Difficulty 1 · Technical 1 · Budget free

Amazon’s own tool. Free, easy, and deliberately narrow: it exists to get a manuscript into Amazon, not to give you a file you can take elsewhere.

Per KDP’s own help pages, checked 2 September 2026: free download for Windows 7 or later and macOS 10.9 or later; imports .doc and .docx from any source plus PDF for print-replica titles; exports a KPF file for KDP, with EPUB export available for reflowable books.

The lock-in is the point to understand. KPF is an Amazon format. If you later go wide to Kobo, Apple and everywhere else, you are starting the formatting again. If you are certain you are Amazon-only, that costs you nothing. If you are not certain, start somewhere that exports EPUB.

See Atticus vs Kindle Create.

Tier three: conversion and repair — not layout tools at all

6. Calibre

Impact 3 · Difficulty 3 · Technical 3 · Budget free

Verified from calibre, 2 September 2026: “completely free and open source”, converts “dozens of file types”, and runs on Windows, macOS and Linux.

What it is for: turning one ebook format into another, managing a library, and stripping a file back when something has gone wrong. What it is not for: designing a book. A Calibre conversion of a Word file produces a working EPUB that looks like a converted Word file, because that is exactly what it is.

The honest use case: you have an EPUB and need an AZW3 or vice versa. Not: you have a manuscript and need a book.

7. Sigil

Impact 3 · Difficulty 4 · Technical 5 · Budget free

Verified from the Sigil project, 2 September 2026: “a free, open source, multi-platform ebook editor”, licensed under the GPLv3, supporting EPUB 2 and EPUB 3, on Linux, macOS and Windows.

This is the scalpel. When KDP rejects a file, or your table of contents will not build, or a stray style is breaking every chapter opening, Sigil is where you open the EPUB and fix the actual markup. It requires you to be comfortable with HTML and CSS. If you are not, this is the point at which paying someone is cheaper than the weekend you are about to lose.

Head to head: Calibre vs Sigil.

Tier four: the writing tool that keeps appearing on formatting lists

8. Scrivener

Impact 3 · Difficulty 4 · Technical 3 · Budget £55

Scrivener is on this page because every roundup puts it here, and it should not be. It is an excellent tool for organising and drafting a complex manuscript — research, corkboards, restructuring a hundred scenes. Its formatting output (“Compile”) is powerful, unintuitive, and not where you should be doing final layout.

Verified from Literature & Latte, 2 September 2026 — and note these are the vendor’s own sterling prices, not our conversion:

There is a 30-day free trial, and a discounted macOS + Windows bundle.

Break-even: 27 copies, once. Worth it as a writing tool. Then export and lay out somewhere else.

See Atticus vs Scrivener.

Tier five: paying someone

9. A formatting service

Impact 5 · Difficulty 1 · Technical 1 · Budget from £69

Disclosure: we sell this. publishing.co.uk offers book formatting from £69, so treat the recommendation with the scepticism it deserves and judge the arithmetic yourself.

The honest comparison is not “service versus software”, it is cost per book against how many books you will publish. Atticus at $147 is cheaper than two paid formats and more expensive than one. If you will publish once, a service is cheaper. If you will publish five times, buy the software and learn it.

The cases where a service genuinely wins on merit rather than convenience:

• Illustrated, tabular or heavily-designed non-fiction, where consumer layout tools run out of control
• A file KDP has already rejected, where the problem is markup rather than design — see KDP EPUB validation failures
• PDF/X-1a for a UK printer, which consumer tools do not reliably produce
• A deadline, where the software’s learning curve is the thing you cannot afford

Compare honestly: Atticus vs a formatting service.

The comparison, in one table

Prices as printed by each vendor on 2 September 2026. Where you see a pound sign it is the vendor’s own sterling price; where you see a dollar sign, what you pay depends on the rate and your card on the day.

Winner for each use case

• Best all-round, any computer: Atticus — $147, runs everywhere, writes and formats.
• Best output, if you have a Mac: Vellum — and download it free to see your own book laid out before paying.
• Best free option: Reedsy Studio — real EPUB and print PDF, no cost, no install.
• Best if you are Amazon-only and certain: Kindle Create — free, but KPF locks you in.
• Best for drafting a complex book: Scrivener at £55 — then lay out elsewhere.
• Best for a rejected file: Sigil, or someone who knows it.
• Best when the book is illustrated or the deadline is real: a service.

UK-specific considerations the US guides leave out

Print-on-demand and trim sizes

UK authors commonly use Amazon KDP or IngramSpark UK, and sometimes domestic printers such as CPI, Clays or Severn. Their requirements differ from the US defaults every tutorial assumes:

• Trim sizes. UK printers work in metric — 135x216mm is the standard UK trade paperback, against the American 6x9in. Setting a US size and sending it to a UK printer causes scaling problems or rejection.
• Bleed and gutter. 3mm bleed is standard where colour or images run to the edge, and the inside gutter needs enough margin for perfect binding — around 20mm on a full-length book.
• PDF/X-1a. Several UK printers ask for PDF/X-1a, which fixes the colour profile and resolution. A standard export from Word or Scrivener is not compliant without Acrobat Pro or an equivalent.

ISBNs

UK ISBNs come from Nielsen, and unlike the US there is no free-ISBN equivalent to Bowker’s paid-only model — but they are not cheap in ones.

Verified from the Nielsen UK ISBN Store, 2 September 2026. All prices include UK VAT:

The arithmetic that catches people out. One ISBN is £93. Ten are £174 — so the second through tenth cost £9 each. If there is any chance of a second edition, a hardback, or a second book, the block of ten is the obvious purchase. And remember each format needs its own ISBN: paperback, hardback and ebook are three, not one.

KDP will give you a free ISBN, but it lists Amazon as the publisher of record and cannot be used elsewhere. If you want to be the publisher, buy your own.

VAT

UK ebooks are zero-rated for VAT, which is why an ebook royalty calculation in sterling looks cleaner than the US equivalent. Print books are also zero-rated. The software you buy to make them is not — US vendors typically add VAT at checkout, so a $147 tool costs more than $147.

The vocabulary, in one place

Every tool’s documentation assumes you already know these, and getting one wrong is how a file gets rejected.

• Reflowable — an ebook whose text re-wraps to fit any screen and font size. This is what a normal novel should be. The reader controls the type size; you do not control the page breaks.
• Fixed-layout — every page is a fixed image-like canvas. Correct for picture books, cookbooks and heavily-illustrated non-fiction; wrong for prose, where it produces a file readers must pinch and zoom.
• Trim size — the finished page size after cutting. 135x216mm is the UK trade paperback standard; 6x9in is the US one.
• Bleed — 3mm of artwork extending beyond the trim, so that when the cutter is fractionally off you get colour to the edge rather than a white sliver.
• Gutter — the inside margin swallowed by the binding. It must be wider than the outside margin, and wider again on a thick book, or the text disappears into the spine.
• Front and back matter — title page, copyright page, dedication, and at the back the author’s note and the ask for a review. The copyright page is the one authors most often omit.
• EPUB — the open ebook standard everyone except Amazon uses, and which Amazon also accepts.
• KPF — Kindle Create’s own output format. Amazon only.
• AZW3 — an older Kindle format you may need for sideloading, not for publishing.
• PDF/X-1a — a constrained PDF with fonts embedded and colour flattened, which several UK printers require.
• Validation — checking an EPUB against the spec before upload. A file that opens fine on your machine can still fail at KDP.

What using each one actually involves

Not a tutorial — the shape of the job, so you can judge the time cost before you commit.

Atticus. Import your .docx. Pick a theme, then adjust chapter-opener style, ornamental breaks and running heads. Set trim size for print. Preview in the built-in device previews. Export EPUB and print PDF separately. An afternoon for your first book, twenty minutes for your second.

Vellum. Import your .docx. Choose one of eight styles. That is very nearly the whole job — Vellum’s design decision is that you get excellent defaults instead of controls. Generate ebook and print files. Under an hour, first time. Do this on the free version before paying.

Reedsy Studio. Write or paste in the browser, mark chapters, choose a template, export. Fewer choices than Atticus, which is why it is faster. An hour, and no install.

Kindle Create. Open your .docx, accept or adjust the detected chapter breaks, pick a theme, export the KPF, upload to KDP. Half an hour, and no decisions to regret because there are barely any to make.

Word. Build a proper style sheet, set mirrored margins with a gutter, use section breaks to control page numbering across front matter and body, then export PDF. A day, and longer if you have never used styles. The silent-failure risk is real: it looks correct on screen and is wrong at the printer.

Scrivener. Draft in the binder, then Compile — which is a genuinely deep templating system with its own vocabulary. Budget several hours to learn Compile, and consider exporting to a layout tool instead.

Calibre or Sigil. Not a formatting session — a repair session. You open the file, find the broken markup, fix it, re-validate. Fifteen minutes if you know what you are looking for and an entire weekend if you do not.

Common mistakes

1. Buying a conversion tool to do layout. Calibre will convert your Word file and the result will look like a converted Word file.
2. Formatting before the edit is final. Every structural change means redoing the layout. Format last.
3. Paying for Vellum before trying it. It is free until you publish. There is no reason not to load your own book first.
4. Using US trim sizes for a UK printer. See above.
5. Buying one ISBN. £93 for one, £174 for ten.
6. Not validating the EPUB. A file that opens on your computer can still fail at KDP. See EPUB validation errors.
7. Treating the ebook and the print interior as the same job. One reflows to any screen; the other is fixed to a page. Tools that do both do them separately, and so should you.

Frequently asked questions

What is the best book formatting software in 2026?

Atticus for most people — $147 one-time, runs on every platform, writes and formats. Vellum produces better output but only runs on macOS. If your budget is zero, Reedsy Studio is genuinely capable.

Is there genuinely free book formatting software?

Yes. Reedsy Studio exports print-ready PDF and EPUB at no cost, and Kindle Create is free if you are publishing only to Amazon. Calibre and Sigil are free and open source but do conversion and repair, not design.

Do I need to buy Vellum to try it?

No. You can download it and build, style and preview your whole book for free — you pay when you are ready to publish. Judge it on your own manuscript before spending $199.99.

Can I format a book in Word?

You can, and the result can be acceptable for straight prose if you use styles, section breaks and mirrored margins properly. Word has no native EPUB export, so the ebook still needs another tool.

How much does a UK ISBN cost?

£93.00 for a single ISBN or £174.00 for a block of ten from the Nielsen UK ISBN Store, both including VAT, checked 2 September 2026. Each format needs its own.

Should I pay someone instead?

Compare the cost per book against how many books you will publish. For one book a service is usually cheaper than buying and learning software. For five, buy the software. For an illustrated book, a rejected file, or a real deadline, a service wins on merit.

Related guides

• Calibre vs Sigil — the conversion and repair pair, compared properly
• Vellum vs Atticus — the two paid layout tools head to head
• Vellum alternatives for Windows — what to use when the best tool will not run
• EPUB validation errors — when the file fails at upload
• Best AI tools for authors — 22 tools rated the same way