Export print-ready comics and books. KDP-ready. CMYK. Built for print.

You drew the pages. Now you need clean files a printer or Amazon KDP will actually accept, without renting your software by the month. Sloom Studio lays out your comic or book and exports proper print production files, in an app you buy once and own.

Download free — Windows Linux AppImage Buy the license — $17.99

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 macOS builds (unsigned): Apple Silicon · Intel. They're not signed yet, so here's how to open them the proper way →

Free to download and lay out your whole book. The one-time license unlocks the professional print exports. No subscription, no account, no ads.

The export formats print actually needs

KDP-ready PDFPDF/X-1aPDF/X-4CMYK / spot swatchesAdobe IDMLCBZWebtoon stripHigh-res PNG / JPG

Amazon KDP, a print-on-demand service, and a traditional printer each want different things. Sloom Studio exports the ones that matter: KDP-ready interiors and covers, conformant PDF/X-1a and PDF/X-4 with real CMYK through an embedded ICC output intent, named spot-color swatches written as real Separation plates, and text embedded as vector curves where supported. You also get a structurally valid, spec-correct Adobe IDML package for InDesign/Affinity Publisher handoff (IDML import is not yet supported), plus CBZ and a webtoon strip for digital. The browser PDF export is a fast RGB proof; the PDF/X path is the press-certified output.

A finished Weights & Measures comic spread in the Paper workspace: a desert town establishing page and a cold-aisle lab page with speech bubbles, with the Paper Inspector panel open on the right

The Paper workspace producing print-ready output — panels, linked speech bubbles, and production settings open in the Inspector.

Lay the whole book out in one place

Pages, panels, bleed & trimSet up spreads with real bleed and trim marks so the print file is correct the first time.
Lettering that behavesThreaded text that flows page to page, speech bubbles with draggable tails, and an SFX designer for sound effects.
Your art, your wayPaint and ink your pages in the Image editor, or bring in art you already made. Build an entire book by hand.
One project fileEverything lives in one .sloom project on your machine. Copy it, back it up, and move it like any other file.
$17.99 one-time · beta price

Everything else — laying out your pages, painting, lettering, webcomic and CBZ export — is free to use for as long as you like. The license is due once your work goes to paid print, and it removes the startup notice and marks your exports as licensed.

You own it. It runs on your machine.

No subscription and no account. Sloom Studio is local-first: your project files and your work stay on your device. It is even source-available if you want to read exactly what it does. Windows and Linux today, plus experimental macOS builds, with the same one-time key covering Android.

Download free — Windows Linux AppImage macOS (experimental) Buy the license — $17.99