🔥 AI-powered paraphrasing tool supporting multiple languages and writing styles.
- Multi-language Paraphrasing — Auto-detect input language, output in 8+ languages
- Tone Control — Formal, Casual, Academic, Short & Concise, or Translate-only mode
- Multiple AI Models — Choose between Gemini 3 Flash, Gemini 1.5 Flash, or GPT-OSS 120B
- Multiple Variants — Generate 1–3 variations simultaneously
- Diff Highlighting — Word-by-word change visualization (added/removed)
- Readability Stats — Flesch score, grade level, reading time, word/char counts
- History — Auto-saved paraphrase history (localStorage, max 20 entries)
- Daily Limit — Free tier with 10 requests/day + donation CTA
- Dark Mode UI — Premium glassmorphism design with smooth animations
- Node.js 18+
- A Google AI Studio API key (Gemini)
# Clone the repository
git clone https://github.com/yourusername/theparafrase.git
cd theparafrase
# Install dependencies
npm install
# Set up environment variables
cp .env.example .env.local
# Edit .env.local and add your API keysCreate a .env.local file in the project root:
GEMINI_API_KEY=your_gemini_api_key_here
OPENROUTER_API_KEY=your_openrouter_api_key_here # Optional, for GPT-OSS modelnpm run devOpen http://localhost:3000 in your browser.
npm run build
npm run start| Layer | Technology |
|---|---|
| Framework | Next.js 16 (App Router) |
| Language | TypeScript 5 |
| Styling | Tailwind CSS 4 |
| UI Components | shadcn/ui (base-ui) |
| AI Provider | Google Gemini API / OpenRouter |
| Deployment | Vercel |
src/
├── app/
│ ├── api/paraphrase/ # API route handler
│ ├── globals.css # Design system & animations
│ ├── layout.tsx # Root layout with SEO metadata
│ └── page.tsx # Main application page
├── components/
│ ├── ui/ # shadcn/ui components
│ ├── DiffViewer.tsx # Word diff visualization
│ ├── HistoryPanel.tsx # History drawer panel
│ ├── LimitModal.tsx # Daily limit CTA modal
│ └── ReadabilityStats.tsx # Text metrics display
└── lib/
├── readability.ts # Flesch score calculator
├── useDailyLimit.ts # Daily usage tracking hook
├── useHistory.ts # History persistence hook
└── utils.ts # Utility functions
- API keys are server-side only (never exposed to the client)
- Input validation & sanitization on API routes
- Rate limiting via daily request caps
- Security headers configured via
next.config.ts - Input length capped at 2000 words
- Fork the repository
- Create your feature branch (
git checkout -b feature/amazing-feature) - Commit your changes (
git commit -m 'Add amazing feature') - Push to the branch (
git push origin feature/amazing-feature) - Open a Pull Request
This project is licensed under the MIT License — see the LICENSE file for details.
If you find this tool useful, consider supporting the development:
