What is a Live Code Compiler?
A live code compiler (also called a playground or sandbox) is a browser-based editor that lets you write HTML, CSS, and JavaScript and immediately see the rendered result in a preview pane. There's no setup, no build step, and nothing to install - everything runs locally in your browser using a sandboxed iframe.
What you can do with this tool
- Write HTML - just the content you want to render, no boilerplate needed.
- Style with CSS - add any valid CSS targeting the HTML you wrote.
- Add JavaScript - vanilla JS that runs against the rendered DOM.
- Live preview - click Run to execute and see the result.
Privacy & safety
Your code never leaves your browser. The preview runs inside a sandboxed iframe, so any JavaScript you execute is isolated from the rest of the page.
Frequently Asked Questions
Is my code saved or sent to a server?
No. All editing and execution happens entirely inside your browser. Your code is never uploaded, logged, or stored. Refreshing the page clears your work, so copy anything you want to keep.
Which languages does the compiler support?
The tool supports HTML, CSS, and JavaScript. You can use modern ES6+ JavaScript, CSS3 features, and standard HTML5 markup. Server-side languages are not supported since the compiler runs entirely in your browser.
Can I use external libraries like React, jQuery, or Bootstrap?
Yes. Add a script or link tag inside the HTML editor pointing to a public CDN such as unpkg, jsdelivr, or cdnjs. The library loads when you click Run.
Where does console.log output appear?
Open your browser Developer Tools (F12) to see console.log, console.warn, or console.error output from the iframe. The preview pane only shows the rendered DOM.
Why is my JavaScript not running?
Make sure you clicked Run after editing - the preview does not auto-refresh. Also check your browser console for syntax errors.
Can I export or download my code?
There is no built-in export yet. You can manually copy the contents of each editor into a local .html, .css, or .js file.
