v30.5 Live

Near-Instant

Monaco Editor.
In Your Browser. In Your Browser. In Your Browser.

The ultimate Monaco Editor online sandbox. Write, format, and debug frontend code with the exact same engine that powers VS Code. No installation required.

function compile() {
engine.run({
target: "local_memory",
speed: "near-instant"
});
}

Launch Workspace Read the Docs

Monaco Engine Auto-Format Emmet Native Syntax Highlighting Shortcuts

The Power of VS Code. Zero Installation.

We integrated Microsoft's core Monaco Editor directly into the browser. Experience syntax highlighting, intelligent code completion, and advanced formatting without downloading a single megabyte.

Native Emmet Support

Stop typing out HTML tags. We have pre-configured Emmet abbreviations so you can scaffold complex DOM structures with just a few keystrokes, exactly like your desktop setup.

> Press Tab
⚡ Auto-expands instantly.

Advanced IntelliSense

Enjoy deep JavaScript and CSS autocomplete. The editor understands your context and suggests native browser APIs, CSS properties, and DOM methods.

// Start typing doc...
document.getElementById('app');

Command Palette Access

Hit F1 to open the Monaco Command Palette. Access hundreds of built-in editor actions, from multi-cursor editing to document formatting, right from your keyboard.

> Format Document
⚡ Code beautifully aligned.

Full Workspace. $0.

Other cloud web IDEs charge you monthly just to keep your frontend projects private. We built a free, local code editor for the community.

Server Round-Trips

Client-Side Privacy

Local Workspaces

Free Forever — The Only Plan

$0/forever

Every built-in feature free. No card required.

Local Projects, Limited Only by Browser Storage

Complete Privacy (Client-Side Only)

Developer Command Line

100% Free & Open Source Codebase

Launch Workspace

How It Works

VS Code's engine, zero installation, four steps.

Step 1 — Launch in your browser

Open the workspace and Monaco is already there — no download, no setup wizard, no extensions to install before you can type.

Step 2 — Code with muscle memory

Multi-cursor editing, find and replace, the F1 command palette, and the keyboard shortcuts you already know from VS Code all work here.

Step 3 — Let the editor help

Emmet expands abbreviations as you type, IntelliSense suggests DOM methods and CSS properties, and auto-format keeps everything tidy.

Step 4 — See the result

The live preview renders your HTML and CSS beside the editor, with a console for JavaScript output — edit and verify without switching windows.

Common Questions

Straight answers about the editor.

Is this the real Monaco editor?

Yes — the exact editor engine that powers VS Code, running in your browser tab. Same syntax highlighting, same editing model, same command palette.

Which languages does it support?

The workspace is tuned for frontend work: HTML, CSS, JavaScript, and JSX, each with syntax highlighting, smart indentation, and language-aware autocomplete.

Does Emmet actually work here?

Yes, Emmet comes pre-configured. Type an abbreviation like div.container>ul>li*3, hit Tab, and it expands instantly — no plugin to install.

Can I use VS Code keyboard shortcuts?

The core ones work: multi-cursor with Alt+click, F1 for the command palette, Ctrl+F for find, and the familiar editing chords. If your fingers know VS Code, they'll feel at home.

Why use this instead of installing VS Code?

For speed and convenience: quick edits on a Chromebook or shared machine, trying a snippet without launching a heavy app, or coding somewhere you can't install software. It complements a desktop setup rather than replacing it.

Monaco Editor. In Your Browser. In Your Browser. In Your Browser.