Professional book formatting & export app

Your words
Your device

Everything stays on your device. AI always at hand. No distractions, no subscriptions.

v0.2.9 beta · Free

What is Mergen Ink?

Mergen Ink is an free book writing & formatting application built for serious writers.

Read more about Mergen Ink

Simple and easy UI

Designed to get out of your way and let you focus entirely on your writing.

Screenshot 1Screenshot 2Screenshot 3

Why Mergen Ink?

Local-First

All data on your device. Works offline. Our servers never see your writing.

Three Writing Modes

Writing: full focus. Assist: AI helps. Challenge: AI attacks your arguments to make them stronger.

Secure AI

API keys encrypted on device. Choose Claude, Gemini, or GPT-4. No proxy, no middleman.

Book Structure

Part, Chapter, Section hierarchy. Drag-and-drop reordering. Per-section AI context.

Multi-Format Export

Markdown, HTML built-in. DOCX, PDF, EPUB via Pandoc. Auto-backup every 10 saves.

Free

Core features completely free. No hidden fees.

Real privacy

Most writing tools send your data to their servers. Mergen Ink works differently.

All your writing is stored locally in SQLite on your Mac, Windows, or Android device
When you use AI, text goes directly from your device to your chosen provider — not through us
API keys are stored encrypted on your device and never reach us

What authors are saying

"Mergen Ink has fantastic potential and is already a pleasure to use, even at the beta stage. It feels smooth and intuitive, with a calming and aesthetically pleasing UI. While I was initially drawn to the custom export engine as an alternative to Vellum, I found that the writing environment has a lot to offer too. The AI-related functions are unobtrusive and can be kept completely off, as is my own preference, while being available to those who wish to use them. I particularly appreciate the emphasis on privacy and local storage. The app is fast and well-optimized, with a light memory footprint on MacOS. It creates beautifully formatted EPUBs with virtually no learning curve. I'm looking forward to seeing how Mergen Ink evolves in future."

Eleanor Clark Takashima, Japan

"As an indie author, privacy is paramount when working on my drafts. Mergen Ink's offline-first database approach means I don't have to worry about my intellectual property being scraped or stored on random cloud servers. The three writing modes, especially the Challenge mode where the AI constructively questions my plot points, have completely changed how I outline and refine my novels."

Marcus Vance Austin, USA

"The formatting options are incredible. I've wasted hours formatting EPUBs in the past, but Mergen Ink handles it beautifully in a few clicks. It's clean, modern, and lightning fast. I can use my own API keys for Claude directly, which makes AI assistance much more transparent and cost-effective than other subscription tools."

Sophie Dubois Paris, France

"I was looking for a distraction-free environment that keeps my research local. The drag-and-drop hierarchy for Parts and Chapters is super intuitive. The fact that the entire application is so lightweight and works completely offline is exactly what I needed for my writing retreats. Excellent work on the beta!"

Kenji Sato Kyoto, Japan

"What blew me away is the speed of the interface and how unobtrusive the AI assistant is. It doesn't force features on you. The local SQLite architecture is brilliant; my work is secure, and I have complete ownership of my data. It really is a refreshing alternative to Atticus and Scrivener."

Elena Rostova Prague, Czech Republic

Community & Roadmap

Shape the Future of Mergen Ink

Suggest new ideas, vote on requested features, and track what we are building next in our public roadmap.

1. Post

Request a Feature

Suggest what Mergen Ink should build next. Every request starts as a discussion in our community forum — no separate form, no vanishing into a queue.

Suggest a Feature
In Progress

Roadmap

What we're building next, sourced directly from community feature requests.

View the Roadmap

Start writing

v0.2.9 beta · Free for macOS, Windows and Android

Blog

Frequently Asked Questions

Find answers to common questions about Mergen Ink, local-first storage, and API configurations.

Get in Touch

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