CyberWriter

a .md editor built on Apple's (barely-used) on-device AI

Freemium
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macOS
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Customer SupportDesign

Free plan available
No credit card

What is CyberWriter?

CyberWriter is a native macOS Markdown editor that combines local file editing with on-device AI capabilities powered by Apple's built-in machine learning. It's designed for writers, researchers, and technical users who want to work with Markdown files without relying on cloud services or external dependencies. The editor offers live PDF preview, support for LaTeX and Mermaid diagrams, and vault organisation for managing multiple projects. Because the AI runs locally on your Mac, your writing stays on your device.

Key features

Native macOS Markdown editor with syntax highlighting and formatting tools

Live PDF preview that updates as you write

On-device AI assistance using Apple's local machine learning models

Vault support for organising and managing multiple Markdown projects

LaTeX and Mermaid diagram support for technical and scientific writing

Zero external dependencies; all processing happens locally on your Mac

Pros & cons

Advantages

Privacy-focused approach with no cloud uploading or external API calls
Works offline without internet connection required
Native macOS integration and performance
Combines traditional Markdown editing with AI assistance in one tool
No subscription fees for basic writing and editing functionality

Limitations

macOS only; not available for Windows, Linux, or other operating systems
AI capabilities limited by on-device processing power and Apple's built-in models
Smaller user base compared to established editors like Obsidian or iA Writer