Local-First
All data on your device. Works offline. Our servers never see your writing.
Everything stays on your device. AI always at hand. No distractions, no subscriptions.
Mergen Ink is an free book writing & formatting application built for serious writers.
Designed to get out of your way and let you focus entirely on your writing.



Why Mergen Ink?
All data on your device. Works offline. Our servers never see your writing.
Writing: full focus. Assist: AI helps. Challenge: AI attacks your arguments to make them stronger.
API keys encrypted on device. Choose Claude, Gemini, or GPT-4. No proxy, no middleman.
Part, Chapter, Section hierarchy. Drag-and-drop reordering. Per-section AI context.
Markdown, HTML built-in. DOCX, PDF, EPUB via Pandoc. Auto-backup every 10 saves.
Core features completely free. No hidden fees.
Most writing tools send your data to their servers. Mergen Ink works differently.
"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."
"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."
"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."
"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!"
"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."
Community & Roadmap
Suggest new ideas, vote on requested features, and track what we are building next in our public roadmap.
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 FeatureWhat we're building next, sourced directly from community feature requests.
View the Roadmapv0.2.9 beta · Free for macOS, Windows and Android
Highlights from our company trip.
Read moreIntroducing our newest feature.
Read moreA summary of this year.
Read moreFind answers to common questions about Mergen Ink, local-first storage, and API configurations.
Get in Touch
Bug report, feature request, or just saying hello — your message goes straight to us.