Download TypeScript

TypeScript is a free, open-source programming language developed and maintained by Microsoft that adds optional static typing to JavaScript. It compiles to plain JavaScript, meaning TypeScript code runs anywhere JavaScript runs — in browsers, on Node.js, and in Deno — while providing powerful type safety and developer tooling during the development process.

By adding type annotations to variables, functions, and objects, TypeScript enables IDEs to provide accurate code completion, inline documentation, and error detection before your code ever runs. This dramatically improves code quality and maintainability, especially in large codebases and team projects.

TypeScript has become the standard for large-scale JavaScript development and is used by major frameworks including Angular, Next.js, NestJS, and many others. Learning TypeScript is considered essential for modern web development careers.

Key Features

• Optional static typing with interfaces, generics, and type inference
• Compiles to clean, readable JavaScript compatible with all environments
• Rich IDE support with autocompletion, refactoring, and error highlighting
• Supports the latest ECMAScript features and syntax
• Strict null checks and advanced type narrowing for safer code
• Decorators and experimental features for frameworks like Angular
• Free and open-source under the Apache 2.0 license

How to Install

1. Ensure Node.js is installed on your system.
2. Install TypeScript globally via npm: npm install -g typescript
3. Verify installation with tsc --version in your terminal.
4. Create a tsconfig.json in your project with tsc --init to configure compiler options.
5. Write .ts files and compile them to JavaScript with tsc, or use a bundler like Vite or webpack with ts-loader.