Fix Spelling and Grammar

A professional, LLM-powered grammar and spelling correction tool. Simple, fast, and distraction-free.

What It Does

Paste or type your text, and LLM instantly corrects:

• Spelling mistakes
• Grammar errors
• Punctuation issues
• Sentence clarity and structure

Get corrected text with a brief explanation of changes made.

Tech Stack

• Frontend: React + TanStack Router + TanStack Start
• Styling: Tailwind CSS + Shadcn UI
• AI: Vercel AI SDK with OpenAI GPT-5
• Animations: Motion (Framer Motion)
• Validation: Zod schemas
• Linting: Biome

Getting Started

# Install dependencies
pnpm install

# Start development server
pnpm dev

# Build for production
pnpm build

# Preview production build
pnpm start

Scripts

pnpm dev          # Start dev server
pnpm build        # Build for production
pnpm start        # Preview production build
pnpm lint         # Run linter
pnpm format       # Format code
pnpm check        # Lint + format check

Environment Setup

Create a .env file:

OPENAI_API_KEY=your_openai_api_key

Features

• Clean UI: Minimalist design focused on the task
• Real-time Streaming: See corrections as they're generated
• Copy to Clipboard: One-click copy with visual feedback
• Detailed Explanations: Understand what was changed and why
• Responsive: Works seamlessly on all devices
• Dark Mode Support: Adapts to system preferences

How It Works

1. User enters text in the input field
2. Text is sent to /api/fix endpoint
3. An LLM processes and corrects the text
4. Response streams back in real-time
5. Corrected text and explanation are displayed
6. User can copy the result with one click

Credits

Built by Dan Zabrotski

License

MIT