Deno is a modern, secure, and fast JavaScript and TypeScript runtime built in Rust that offers a reimagined developer experience for server-side code execution.

Deno represents a major leap forward for server-side JavaScript by embedding security, modern web standards, and developer utilities directly into a single binary.

* Secure-by-default sandbox architecture requires explicit permission flags before scripts can read disk files, access the network, or inspect environment variables.

* Native TypeScript parsing and compilation removes the need for complex build pipelines, Babel, or tsconfig boilerplate.

* Built-in developer tools—including test runner, linter, formatter, and dependency management—drastically reduce reliance on third-party tooling and package fatigue.