Deno Has a Free Secure Runtime for JavaScript and TypeScript With Built-In Tooling

Deno is a secure runtime for JavaScript and TypeScript. Created by Node.js founder Ryan Dahl, it fixes Node's design mistakes with security-first defaults.

What You Get for Free

• Secure by default — no file/network/env access without permission
• TypeScript native — no tsconfig, no build step
• Built-in tooling — formatter, linter, test runner, bundler
• npm compatibility — import npm packages directly
• Web standard APIs — fetch, WebSocket, Web Crypto
• Single executable — compile to standalone binary
• Deno Deploy — serverless edge hosting

Hello World Server

Deno.serve((req) => {
  return new Response('Hello World');
});

deno run --allow-net server.ts

Import npm Packages

import express from 'npm:express';
const app = express();
app.get('/', (req, res) => res.send('Hello'));
app.listen(3000);

Deno vs Node.js

Feature	Deno	Node.js
Security	Permissions	Unrestricted
TypeScript	Native	Via build step
Package manager	URL imports + npm:	npm
Tooling	Built-in	External

---

Need Deno development? Check my work on GitHub or email [e-mail] for consulting.