Online IDE & Code Playground for HTML, CSS, JavaScript, React, Vue, TypeScript & MoreBuild, run & preview modern web apps — zero setup, in your browser
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Supports 94 Frameworks & Libraries
Every one opens as a ready-to-run project — Monaco IntelliSense, live preview and npm packages, no install or config.
Languages & tooling
Write, run and preview HTML, CSS, JavaScript and TypeScript online — Sass compiles and npm packages load from a CDN, no build step.
Frameworks
Full in-browser playgrounds for React, Vue, Angular, Solid and Preact — plus Alpine, HTMX and classics like jQuery, all with live preview.
UI & component libraries
Prototype interfaces fast with MUI, Chakra UI, Mantine, Radix and Headless UI — and ship web components with Lit and Shoelace.
CSS frameworks
Style instantly with Tailwind, Bootstrap, Bulma, daisyUI and more — utility-first or component CSS, zero config.
Charts & data viz
Build interactive charts and dashboards with Chart.js, D3, ECharts, ApexCharts, Recharts and Plotly.
Graphics, 3D & games
Render WebGL scenes and 2D games in the browser with Three.js, Babylon.js, PixiJS, Phaser and React Three Fiber.
Animation & motion
Bring UIs to life with GSAP, Motion, Anime.js, Lottie, Swiper carousels and scroll-reveal animations.
State, data & forms
Manage state and data with Redux Toolkit, Zustand and TanStack Query — plus Zod and React Hook Form for typed, validated forms.
Docs, content & maps
Author Markdown, Mermaid diagrams and KaTeX math, add syntax highlighting, and drop in interactive Leaflet maps.
XCODX Studio is a powerful online IDE and code playground that runs entirely in your browser. Build, run and debug modern web applications with real-time live preview, multi-file projects, npm packages, and full support for React, Vue, Svelte and TypeScript — zero install, zero setup.
The complete browser IDE
Powerful all-in-one online IDE to write, run and preview code instantly. XCODX Studio supports HTML, CSS, JavaScript, React, Vue, Svelte and TypeScript with real-time live preview, making it a complete browser-based development environment for modern web development. This intelligent code editor lets you build responsive websites, test UI components, develop JavaScript applications and experiment with modern frameworks — no installation or setup. With an integrated terminal, Git version control, npm package support, import maps, a device emulator and Lighthouse-style audits, XCODX delivers high-performance coding, instant compilation and live rendering directly in the browser. Whether you need an online code editor, a live preview tool, a React or Vue playground, or a professional web development platform, XCODX Studio is built for speed and productivity — and your code never leaves your browser.
85+ LanguagesPython, Go, Rust, C++, Java & more via self-hosted Piston API
Lighthouse AuditPerformance · Accessibility · Best Practices · SEO analysis
PWA & OfflineIndexedDB project storage · No account · Works offline
Every code type, one editor
Monaco syntax highlighting & IntelliSense across the whole stack — with live, no-build in-browser compiling for HTML, TypeScript, React, Vue, Svelte and SolidJS, plus 85+ more languages runnable through the compiler.
XCODX Studio is a full-featured online code editor and browser IDE that lets you write, run and preview
HTML, CSS, JavaScript, React, Vue, Svelte and TypeScript directly in your browser — no installation, no account.
Whether you're prototyping a UI in the JavaScript playground, building a full single-page application, or testing an idea,
XCODX gives you a real HTML editor online, a complete React playground, a
Vue playground with Single-File Component support, and a Svelte playground — all in one online development environment.
An Intelligent Code Editor with Real-Time Live Preview
An intelligent code editor powered by the Monaco engine, with IntelliSense, syntax highlighting, auto-complete, multi-cursor editing,
tabs, a file explorer and a command palette. Pair that with instant live preview
and you get real-time preview that updates as you type. Every keystroke renders live,
with full support for ES modules, CSS, SCSS, TypeScript, JSX and TSX — plus an integrated DevTools console and element inspector to debug right in the browser.
Full Web Development Playground with NPM Packages
Most browser editors stop at vanilla JavaScript. XCODX Studio is a true npm browser IDE:
import any package using bare specifiers (import Vue from "vue") and import maps, resolved and loaded
from a CDN automatically. Bring in React, Vue, Svelte, Three.js, Chart.js, Tailwind, GSAP,
or any of the millions of JavaScript libraries on npm — with no npm install,
no bundler config and no build step.
A Professional Online IDE for Serious Projects
XCODX Studio is a professional online IDE for developers building real projects, not just snippets.
Multi-file projects, a project workspace with file explorer, ZIP import & export, browser storage and starter templates give you a complete workspace. A built-in mobile
device emulator, Lighthouse-style performance and accessibility audits, an integrated terminal, Git version control with GitHub import/export,
and a Jupyter/Markdown/Mermaid notebook make it a modern, interactive coding environment — and it installs as a PWA that works offline.
Online Compiler for Python, Java, C, C++ and 85+ Languages
Beyond web languages, XCODX Studio is a full online compiler: run Python, Java, C, C++, Go, Rust, PHP, Ruby and 85+ more directly in your browser with real input and output. No local toolchain and no setup — write code, press run and see results instantly. It works as a fast online Python compiler, a Java compiler online and a C++ compiler, all in one place.
Free HTML, CSS and JavaScript Editor Online
XCODX is a complete HTML editor online with a live result pane — write HTML, CSS and JavaScript and watch the page render as you type. A true online CSS editor and JavaScript playground with support for ES modules, Sass, JSX and TypeScript, plus IntelliSense and an integrated console to run JavaScript online and debug in real time.
A Code Playground to Prototype, Test and Share
Use XCODX as a code playground to spin up an idea in seconds — an HTML/CSS/JS playground, a React playground or a scratchpad for a quick function. Export your work as a ZIP or a portable .xcodx project and pick up right where you left off. Ideal for prototypes, coding tests, teaching examples and reproducible bug reports.
No Install, No Sign-Up — Code on Any Device
XCODX Studio is a free online code editor with no download and no account required. Because it runs entirely in the browser it works on any laptop, Chromebook or tablet — ideal when you can't install an IDE. Projects save locally in the browser and it installs as a PWA that works offline, so coding online stays fast and private.
TypeScript Playground with Instant In-Browser Compilation
XCODX is a full TypeScript playground: write typed code with complete IntelliSense, then run TypeScript online as it compiles in your browser — no tsc install and no config. Type errors surface inline as you type, and JSX, TSX, decorators and modern ES features all just work — so you can prototype typed React components or test a quick snippet in seconds.
Choose a Template
Start from a framework or library — each opens a ready-to-run project with live preview and IntelliSense.