Edithor ✂️

A smart text chunking tool designed for breaking down voiceover scripts into AI-friendly bite-sized pieces.

🎯 Purpose

Edithor helps you split long voiceover scripts into manageable chunks that AI voiceover tools can process effectively. Unlike simple character-count splitters, Edithor intelligently preserves sentence boundaries, ensuring your chunks never cut off mid-sentence.

✨ Features

• Smart Chunking: Automatically splits text while respecting sentence boundaries
• Flexible Input: Paste text directly or upload a text file
• Customizable Chunk Size: Set your preferred character limit (default: 500)
• Multiple Export Options:
  • Single file with numbered chunk headers
  • Multiple files bundled in a ZIP download
• Live Preview: See your chunks before downloading
• Dark Mode: Easy on the eyes with default dark theme
• Modern UI: Built with shadcn-svelte components

🚀 Quick Start

Installation

# Install dependencies
npm install

# Start development server
npm run dev

Visit http://localhost:5173 to use the app.

Usage

1. Input your text:

   • Paste directly into the text area, or
   • Upload a .txt file

2. Set chunk limit:

   • Adjust the character limit (default: 500)
   • Text will be split intelligently without breaking sentences

3. Preview & Download:

   • View chunked results in the preview panel
   • Download as a single file with chunk headers
   • Or download as multiple files (ZIP)

🛠️ Tech Stack

• Framework: SvelteKit 2 + Svelte 5
• Styling: Tailwind CSS 4 + shadcn-svelte
• Language: TypeScript
• Build Tool: Vite
• Testing: Vitest + Playwright

📦 Building for Production

npm run build

Preview the production build:

npm run preview

🧪 Testing

# Run all tests
npm test

# Unit tests only
npm run test:unit

# E2E tests only
npm run test:e2e

🏗️ Project Structure

src/
├── lib/
│   ├── components/
│   │   ├── ui/              # shadcn components
│   │   ├── TextInput.svelte
│   │   ├── ChunkSettings.svelte
│   │   ├── ChunkPreview.svelte
│   │   └── ExportOptions.svelte
│   ├── utils/
│   │   ├── chunker.ts       # Core chunking logic
│   │   └── fileHandler.ts   # File I/O operations
│   └── types/
│       └── index.ts
└── routes/
    └── +page.svelte         # Main application

💡 How It Works

Edithor uses an intelligent sentence-boundary detection algorithm:

1. Parse Text: Identifies sentence endings (. ! ? followed by space/newline)
2. Smart Splitting: Groups sentences into chunks up to the character limit
3. Boundary Preservation: Never breaks sentences mid-way - if adding the next sentence exceeds the limit, it starts a new chunk
4. Export: Generates files with proper formatting and metadata

🎨 Customization

Chunk Settings

• Adjust character limit (default: 500)
• Future: Custom sentence delimiters, paragraph preservation options

Export Formats

• Single File: All chunks in one file with "Chunk {n}" headers
• Multiple Files: Individual txt files bundled in a ZIP archive

📝 Development

Code Quality

# Format code
npm run format

# Lint
npm run lint

# Type check
npm run check

Adding shadcn-svelte Components

npx shadcn-svelte@latest add [component-name]

🚧 Roadmap

• PDF and DOCX file support
• Custom delimiter patterns
• Save/load chunking presets
• JSON/CSV export options
• TTS preview for chunks
• Cloud storage integration

🤝 Contributing

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

📄 License

MIT

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