SvelteMark

A privacy-first, open-source, local-only markdown editor built with Svelte 5.

Your notes never leave your device. No accounts. No tracking. No cloud.

✨ Features

🔒 Core Philosophy

• Local-First Architecture: 100% of data lives in your browser's IndexedDB via Dexie.js.
• Privacy Focused: Zero telemetry, no server uploads, no account required.
• Offline Ready: Full PWA support. Install it on your device and write without internet.

⚡ Editor Capabilities

• Live Preview: Real-time rendering with CodeMirror 6.
• Smart Scroll Sync: Bi-directional scrolling matches your editor and preview perfectly.
• Rich Content:
  • Diagrams: Native Mermaid.js support (Flowcharts, Sequence, Gantt).
  • Math: LaTeX equations via KaTeX.
  • GFM: Full GitHub Flavored Markdown support (Tables, Task lists, etc).
• File System: Hierarchical file tree with drag-and-drop organization.

🛠️ Tools

• Backup & Restore: One-click JSON export of your entire database.
• Distraction Free: Auto-hiding UI and "View Only" modes.
• Vim Mode: (Coming soon/Supported via CodeMirror).
• Print Ready: CSS optimized for beautiful PDF exports (Ctrl+P).

📸 Screenshots

Editor with Live Preview

Markdown Preview with GitHub Styling

File Explorer & Organization

Formatting Toolbar & Context Menu

Help & Keyboard Shortcuts

Getting Started

Prerequisites

• Node.js v18 or higher
• pnpm (recommended) or npm/yarn
• Modern web browser with IndexedDB support

Quick Start

🚀 Getting Started

# Clone the repository
git clone https://github.com/MasFana/sveltemark.git
cd sveltemark

# Install dependencies
pnpm install

# Start development server
pnpm dev

Open http://localhost:5173 in your browser.

Building for Production

# Build the application
pnpm build

# Preview the production build
pnpm preview

⌨️ Keyboard Shortcuts

Text Formatting

Editor Control

View & Navigation

Multi-Select & Selection

Tech Stack

• Framework: Svelte 5 with Runes
• Build Tool: Vite
• Editor: CodeMirror 6
• Database: Dexie.js (IndexedDB wrapper)
• Markdown Processing:
  • unified ecosystem
  • remark-gfm - GitHub Flavored Markdown
  • remark-math + rehype-katex - Math equations
  • rehype-highlight - Code syntax highlighting
• Diagrams: Mermaid
• Styling: github-markdown-css
• Deployment: Cloudflare Pages (optional)
• Offline: Service Worker with cache-first strategy for PWA support

Project Structure

fanadown/
├── src/
│   ├── lib/
│   │   ├── components/
│   │   │   ├── Editor.svelte      # CodeMirror editor component
│   │   │   ├── Preview.svelte     # Markdown preview component
│   │   │   ├── Sidebar.svelte     # File explorer sidebar
│   │   │   ├── FileTree.svelte    # Recursive file tree
│   │   │   └── Toolbar.svelte     # Formatting toolbar
│   │   ├── appState.svelte.ts     # Global reactive state
│   │   ├── db.ts                  # Dexie database operations
│   │   ├── markdown.ts            # Markdown processing pipeline
│   │   └── index.ts               # Library exports
│   ├── service-worker.ts          # PWA offline caching
│   └── routes/
│       ├── +layout.svelte         # App layout
│       └── +page.svelte           # Main page
├── static/                        # Static assets
├── package.json
├── svelte.config.js
├── vite.config.ts
└── tsconfig.json

Data Storage

SvelteMark uses IndexedDB via Dexie.js for local-first data storage. All your notes are stored in your browser and never leave your device.

Database Schema

• folders: id, name, parentId, isOpen
• files: id, folderId (nullable), title, content, createdAt, updatedAt

Note: folderId can be null for root-level files (files not inside any folder).

Export/Import

You can export all your data as a JSON file for backup:

1. Click the ⋯ (More) menu in the toolbar
2. Select Export Backup
3. Save the JSON file

To restore:

1. Click Import Backup
2. Select your backup JSON file

Offline Mode

SvelteMark works fully offline as a Progressive Web App (PWA).

How It Works

• Service Worker: Caches all app assets on first visit
• Cache-First Strategy: Assets are served from cache instantly
• Background Updates: New versions are fetched automatically when online
• Data Persistence: Your notes are stored locally in IndexedDB

Installing as PWA

1. Visit the app in Chrome, Edge, or Safari
2. Click the install icon in the address bar (or "Add to Home Screen" on mobile)
3. Launch from your desktop or home screen
4. Works offline - no internet required!

Notes

• First visit requires internet to download the app
• After installation, the app works completely offline
• Updates are applied automatically when you're back online
• All data stays local - nothing is sent to servers even when online

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Svelte - The amazing reactive framework
• CodeMirror - The versatile code editor
• GitHub - Design inspiration for the dark theme
• ByteMD / StackEdit - Scroll sync inspiration

Made with Svelte 5 | Open Source | Privacy First