The best KDP publishing tools, by the job they do.

Publishing on Amazon KDP is several jobs: writing the book, formatting it into a file KDP accepts, choosing keywords and categories, and designing a cover. Most tools do one of them well, so the picks below are grouped by job, not ranked.

We make SuperEbook, which writes the book and its listing copy. Every other tool was checked against its own website on the date shown.

Checked against each tool’s own site on 11 October 2026.

Best for writing the book, and the listing copy
SuperEbook (ours)
SuperEbook plans the book with you and writes it from your own material, exports PDF, EPUB and DOCX with a cover, and writes a KDP description, keywords and categories from the finished book.
Try SuperEbook free
Best free formatter, made by Amazon
Kindle Create
Turns a finished manuscript into a Kindle ebook and uploads straight to KDP as a KPF file. Formatting only: it doesn't write.
Best free web editor with EPUB and print PDF export
Reedsy Studio
A browser-based writing and formatting editor whose core features, including EPUB and print-ready PDF export, are free.
Best one-time-payment formatter on Windows, Mac and Linux
Atticus
A one-time purchase that formats ebooks and print interiors, with chapter themes and device previews.
Best polished formatter, if you use a Mac
Vellum
Mac-only software known for polished ebook and paperback layouts, sold as a one-time purchase.
Best for keyword and category research
Publisher Rocket
Searches Amazon keywords and categories and shows competition data, as a one-time purchase. Research only: it doesn't write or format.
Best for niche research plus low-content design
Book Bolt
Keyword and product research, a KDP spy extension, and cover and interior design tools, including puzzle books.

At a glance. Price and files.

SuperEbook
Writing the book and its listing copy
Paid plans
From $19/mo, or $20 once
Files
PDF, EPUB and DOCX, plus a KDP listing kit
Kindle Create
Amazon's free ebook formatter
Paid plans
Free
Files
KPF for upload to KDP; imports DOC and DOCX
Reedsy Studio
Free web writing and formatting editor
Paid plans
Core editor free; paid add-ons
Files
EPUB and print-ready PDF with custom trim size
Atticus
Book formatting software
Paid plans
$147 one-time, with free updates
Files
EPUB, PDF and DOCX
Vellum
Mac book formatting software
Paid plans
$199.99 ebooks; $249.99 ebooks and paperbacks; one-time
Files
EPUB 2 and 3, print PDF/X-1a
Publisher Rocket
Amazon keyword and category research
Paid plans
$199 one-time; a subscription may follow
Files
Not stated on their site
Book Bolt
KDP niche research and low-content design
Paid plans
From $19.99/mo billed annually; 3-day free trial
Files
Not stated on their site

Each tool’s category, paid plans and file formats
Tool	What it is	Paid plans	Files
SuperEbook	Writing the book and its listing copy	From $19/mo, or $20 once	PDF, EPUB and DOCX, plus a KDP listing kit
Kindle Create	Amazon's free ebook formatter	Free	KPF for upload to KDP; imports DOC and DOCX
Reedsy Studio	Free web writing and formatting editor	Core editor free; paid add-ons	EPUB and print-ready PDF with custom trim size
Atticus	Book formatting software	$147 one-time, with free updates	EPUB, PDF and DOCX
Vellum	Mac book formatting software	$199.99 ebooks; $249.99 ebooks and paperbacks; one-time	EPUB 2 and 3, print PDF/X-1a
Publisher Rocket	Amazon keyword and category research	$199 one-time; a subscription may follow	Not stated on their site
Book Bolt	KDP niche research and low-content design	From $19.99/mo billed annually; 3-day free trial	Not stated on their site

Questions, answered plainly.

Still have a question? Write to the team.

A manuscript in a format KDP accepts (EPUB or DOCX for ebooks), a cover, and a listing: title, description, keywords and categories. For paperbacks you also need a print-ready interior and cover wrap.

No: Kindle Create and Reedsy Studio are free. Atticus and Vellum are one-time purchases for more control over the design.

KDP allows them but asks you to disclose AI-generated content when you publish. Disclose it, and fact-check the book before it goes on sale.

Only SuperEbook among the tools above writes the book itself. The others format it, research its market or design around it.

We looked for the tools KDP authors most often reach for, and checked each one's own pages. We make SuperEbook, so it's listed under the job it's built for, not ranked.

Names are trademarks of their owners; SuperEbook isn’t affiliated with any of them. Prices and features change: if something is out of date, tell us.