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TTS Azure Web is an Azure Text-to-Speech (TTS) web application built with Next.js 15 and React 19. Fine-tune the output speech results using Speech Synthesis Markup Language (SSML). It allows you to run it locally or deploy it with a single click using your Azure Key.

• Voice Customization: Selection of voice, language, style, and character
• Audio Controls: Adjustments of speech speed, intonation, and volume
• Audio Export: Download generated audio files
• Dual Mode System: Switch between Normal mode (UI controls) and SSML mode (direct markup)
• Configuration Management: Import and export SSML configurations

• Modern Stack: Next.js 15 with App Router, React 19, TypeScript
• Responsive UI: HeroUI (NextUI v2) with Tailwind CSS v4 and Framer Motion
• Internationalization: Built-in i18n support (English/Chinese) with automatic locale detection
• State Management: Zustand with persistent storage and mode switching
• Multiple Deployment Options: Vercel, Docker, or local development

This application is ideal for those looking to minimize setup while experiencing the full capabilities of Azure TTS.

Live demo: https://tts.femoon.top

Get your API Key

• Go to Microsoft Azure Text to Speech and click "Try Text to Speech Free"
• Go to Azure AI services
• In the "Speech services" block, click "Add"
• A region and two subscription keys will be listed beside Speech Services. You only need one key and its corresponding region.

# Build the Docker image
docker build -t tts-azure-web .

# Run with environment variables
docker run -p 3000:3000 \
  -e SPEECH_KEY=your_azure_key \
  -e SPEECH_REGION=your_azure_region \
  tts-azure-web

# Install yarn (if not already installed)
npm i -g yarn

# Install dependencies
yarn

# Build for production
yarn build

# Start production server
yarn start

Before starting development, create a .env.local file at the project root with your Azure credentials:

# Required: Azure Cognitive Services credentials
SPEECH_KEY=your_azure_key
SPEECH_REGION=your_azure_region

# Optional: Application configuration
NEXT_PUBLIC_MAX_INPUT_LENGTH=4000  # Maximum text input length (default: 4000)

# Optional: Next.js configuration
NEXT_TELEMETRY_DISABLED=1         # Disable Next.js telemetry

Common Azure regions: eastus, westus2, eastasia, westeurope, etc.

# Install yarn (if not already installed)
npm i -g yarn

# Install dependencies
yarn

# Start development server (localhost only)
yarn dev

# Or start development server accessible on LAN
yarn lan-dev

• Local development: Open http://localhost:3000
• LAN development: Access via your machine's IP address on port 3000

yarn dev       # Start development server
yarn lan-dev   # Start development server on LAN (0.0.0.0)
yarn build     # Build for production
yarn start     # Start production server
yarn lint      # Run ESLint with auto-fix (max 0 warnings)

• Frontend: React 19 with TypeScript
• Framework: Next.js 15 with App Router
• UI Library: HeroUI (NextUI v2) + Tailwind CSS v4 + Framer Motion
• State Management: Zustand with persistence middleware
• Internationalization: Built-in Next.js i18n with locale detection
• Speech Service: Microsoft Azure Cognitive Services Speech SDK

app/
├── [lang]/              # Internationalized routes (en/cn)
│   ├── ui/             # UI components
│   │   └── components/ # Reusable components
│   └── page.tsx        # Main application page
├── api/                # API routes
│   ├── audio/         # TTS audio generation
│   ├── token/         # Azure authentication
│   └── list/          # Voice list fetching
└── lib/               # Utilities and stores
    ├── stores/        # Zustand state management
    ├── hooks/         # Custom React hooks
    └── i18n/          # Internationalization config

• Dual Mode System: Toggle between Normal mode (UI controls) and SSML mode (direct markup)
• State Persistence: Automatic localStorage sync for user preferences and configurations
• Mode Switching: Seamless switching between modes with state caching
• Responsive Design: Mobile-first design with adaptive layouts

This project follows the Conventional Commits specification:

• feat: Add new functions
• fix: Fix issues/bugs
• perf: Optimize performance
• style: Change code style without affecting functionality
• refactor: Refactor code
• revert: Undo changes
• test: Test related, does not involve business code changes
• docs: Documentation and annotations
• chore: Update dependencies/modify configuration
• ci: CI/CD related changes

1. Pre-commit hooks: Husky runs ESLint and Prettier on staged files
2. Linting: ESLint with TypeScript, Prettier, and import ordering rules
3. Commit validation: Commitlint enforces conventional commit messages
4. Code quality: Maximum 0 ESLint warnings allowed

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

• Live Demo: https://tts.femoon.top
• Issues: GitHub Issues
• Repository: GitHub Repository

• Microsoft Azure Cognitive Services for providing the TTS service
• Next.js for the React framework
• HeroUI for the component library