Format your KDP books in software you own.
If you self-publish on Amazon KDP and you're tired of paying a monthly fee just to lay out your own books, this is for you. Sloom Studio lays out interiors and covers and exports the print-ready files KDP wants — and you buy it once and keep it. No subscription. Stop paying and nothing gets taken away, because there's nothing to stop paying.
Free Print-Ready Pack: comic and book page templates made in Sloom Studio, plus the KDP preflight checklist for trim, bleed, margins, and spine math.
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On a Mac? Experimental builds are here too: Apple Silicon · Intel · how to open them →
Free to lay out your whole book. The one-time license unlocks the professional print exports.
Own it, don't rent it
Renting (monthly apps)
- Pay every month to keep formatting your own books
- Stop paying, lose access to your layout tools
- Price goes up, your margins go down
- Your source files can end up locked to a service
Sloom Studio
- Buy once, keep it forever
- Works offline, no account
- Your book files are plain files you own
- Source-available if you want to verify it
Whether it's a novel interior, a low-content journal or planner, a puzzle or activity book, or a full-color children's book, Sloom Studio covers the layout-to-print pipeline in one app you own outright.
From manuscript to print-ready, one app
The Paper workspace producing print-ready output — panels, linked speech bubbles, and production settings open in the Inspector.
- Everything to lay out your interior and cover is free to use
- The one-time license unlocks pro print production — KDP-ready PDF, conformant PDF/X-1a/X-4 with real CMYK/ICC and named spot Separation plates, CMYK/spot swatches, plus a structurally valid Adobe IDML package export
- One key covers desktop and Android, verified offline, yours forever
- Beta price through version 0.9.x; $39 starting with version 1.0