About HCODX

One platform for everything you write, run, calculate, and ship.

HCODX is a free, browser-based platform for developers. At its core is a fast, live-preview HTML/CSS/JS editor and an advanced VS Code-style IDE — so you can go from idea to running code in seconds, all locally in your browser. No installs, no signup, no file uploads.

Open Editor

hello.js — HCODX

// Live preview, instantly in your browser
function greet(name) {
 return `Welcome to HCODX, ${name}`;
}

console.log(greet("developer"))

Live

Instant preview

Local

Runs in your browser

Editor modes

Signup required

What is HCODX

A complete coding environment — in a tab.

HCODX (pronounced H-Code-X) is a high-performance, privacy-first platform built for developers, students, educators and freelancers. Every product on HCODX runs directly in your browser: your code and files stay on your device, the interface is fast, and you can move from idea to running code in seconds. No signup. No file uploads.

At the heart of the platform is the HTML/CSS/JS Editor with live preview and an advanced VS Code-style IDE — import NPM modules, use frameworks like React or Vue, debug in an integrated console, and export ready-to-deploy files, all without leaving your browser.

Editors

One fast editor. Zero setup.

A fast, distraction-free HTML/CSS/JS playground with instant live preview — right in your browser.

HTML Editor

HCODX Editor

A fast, lightweight HTML, CSS, and JavaScript editor with instant live preview, integrated console, and local-storage persistence — beginner friendly, zero setup.

Open Editor

Built-in editor capabilities

Live previewReal-time rendering of HTML, CSS, and JavaScript as you type.
Multi-file projectsFile tree, tabs, and project persistence — manage real codebases.
Syntax highlightingMonaco-powered highlighting for HTML, CSS, JS, TS, Vue, JSX, and more.
Integrated consoleDebug JavaScript directly inside the editor — logs, errors, traces.
NPM modules (VS Editor)Import packages from NPM and use frameworks like React or Vue.
Auto-format & lintOne-click Prettier formatting and on-the-fly validation.
Light & dark themesEditor and UI follow your OS preference automatically.
One-click exportDownload your project as ready-to-deploy HTML/CSS/JS files.
Responsive previewPreview your site at any device size from the built-in emulator.
Runs offline-capableMost editor features work without a server round-trip.

Why HCODX

Built around how developers actually work.

Privacy-first

Editor projects stay in your browser. No tracking of your source code, no required accounts.

Built for speed

Optimized payloads, instant cold loads, minimal UI chrome. Designed to keep you in flow.

One platform

Editor, IDE, and tools in one place — replace a dozen open browser tabs.

Any device

Mobile-first responsive UI. Code from a laptop, a tablet, or a phone — anywhere.

No signup

Open a URL, start coding. No email, no password, no friction.

Always free core

Editor and dev tools stay free. Pro features remain optional for power users.

Who uses HCODX

Trusted by developers, students, and teachers worldwide.

Developers

Prototype components, debug snippets, share runnable demos in seconds.

Students

Practice HTML, CSS & JavaScript on any device — perfect for courses, bootcamps, self-study.

Educators

Share live, runnable examples with classrooms — no installs for students.

Teams

Quickly share a reproducible bug case, demo, or formatted dataset — by URL.