Online Deno Compiler
Deno is a modern JavaScript runtime with built-in TypeScript support. Run JavaScript/TypeScript with Deno instantly.
// Online Deno compiler (JavaScript/TypeScript)
// Write JS/TS code in this online editor and run it
function greet(name: string): void {
console.log(`Hello, ${name}!`);
}
greet("Tutorsbot");
Deno is a modern JavaScript runtime with built-in TypeScript support. Run JavaScript/TypeScript with Deno instantly.
What is Deno?
Deno is a modern JavaScript/TypeScript runtime built by Ryan Dahl — the original creator of Node.js — to fix the design decisions he regrets. It ships TypeScript out of the box, uses ES modules natively (no require()), and runs with a secure-by-default permissions model (no network or filesystem access unless explicitly granted).
Why run Deno in the browser
Deno's installer is small, but the runtime then has to fetch and cache your dependencies on first use, and you have to grant the right --allow-* flags. A browser sandbox lets you try a Deno snippet without the install step and without the permission prompts.
Common Deno tasks
TypeScript scripts and CLIs (Deno makes deno run --allow-net script.ts the entry point), Fresh and Aleph.js web frameworks, Deno KV (a serverless key-value store built into the runtime), Deno Deploy edge functions, and Node.js compatibility code via the npm: specifier. The sandbox runs Deno 1.32.
Getting started with Deno 1.32
Paste a TypeScript snippet — function greet(n: string): void { console.log(`hi, ${n}`) } greet("Tutorsbot") — hit Run, see stdout. The highlighter handles modern JS/TS syntax including template literals, optional chaining ?., and ES module imports. The default snippet uses Deno's TypeScript-ready runtime.
Why use the Deno online compiler?
- Deno 1.32
- Built-in TypeScript
- Secure by default
- Modern JS runtime
Frequently Asked Questions
- Is the Deno online compiler free?
- Yes — Tutorsbot's Deno compiler is completely free. No account required, no installation, and no usage limits.
- Do I need to install Deno?
- No. The Deno compiler runs entirely in your browser. No runtime, no SDK, no PATH configuration. Open the page and start coding.
- Is my Deno code saved between sessions?
- Yes — your code autosaves to your browser's local storage so you can resume where you left off. You can also generate a shareable URL.
- Can I share Deno code with others?
- Yes. Click the Share button to copy a URL that encodes your script. Anyone with the link can open and run it instantly — no account required on their end.
- Is the Deno compiler safe to use?
- Absolutely. Every program runs in an isolated sandbox. Your local system is never exposed to the executed code, and nothing is persisted after the execution window.