Book Formatting Software for Windows, Mac & Linux
Thanks for checking us out! Lacuna is book formatting software that helps you turn your DOCX file into a professionally formatted book. Generate print-ready PDFs for paperbacks and hardcovers, or EPUB files for eBooks.
No credit card required. Full features during trial.
Hi, we’re Melissa & Corey
We’re a brother-and-sister team who built Lacuna together. Melissa has been writing for over 20 years and has published 15 books. She knows what authors need because she is one.
We built Lacuna to give indie authors easier access to professional-quality formatting. Traditional-level publishing with all the bells and whistles, everything customizable, and a process that’s actually simple. No investors, just a family business building software for authors who deserve better tools.
Exclusive for HNSNA Attendees
10% Off Your Purchase
Use this code at checkout when you’re ready to buy. Download and try Lacuna completely free first.
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What Can Lacuna Do for You?
Windows, Mac & Linux
Desktop-native software that runs on your computer. No browser, no cloud, no internet required. Your manuscripts never leave your machine.
Import & Format
Import your DOCX manuscript, pick from professional templates, and customize every detail. Export print-ready PDFs and EPUBs.
One-Time Purchase
$149, once. No subscriptions, no monthly fees. Format unlimited books forever. Try the full app free before you buy.
Total Customization
Every margin, header, font, and ornament is yours to control. Start simple with a template, or fine-tune every element to match your vision.
Questions? Contact us. We’d love to hear from you.