Getting Started with ProLiveEditor
ProLiveEditor is a free, browser-based code editor for HTML, CSS, and JavaScript. Write code and see the results instantly with our real-time live preview.
What is ProLiveEditor?
ProLiveEditor is designed to make web development quick and easy. Whether you're a beginner learning HTML/CSS/JS or an experienced developer prototyping ideas, our editor provides everything you need in one place.
Key Features
- Real-Time Preview — See changes instantly as you type
- Monaco Editor — VS Code-powered editing experience
- Tailwind CSS — Built-in support for utility-first CSS
- Auto-Save — Your code is saved automatically
- 100% Private — All code runs locally in your browser
Quick Start
- Visit ProLiveEditor
- Start typing HTML in the editor
- Watch the preview update in real-time
- Switch tabs to add CSS or JavaScript
Editor Basics
The ProLiveEditor interface is divided into three main areas: the sidebar, the code editor, and the live preview panel.
The Sidebar
The left sidebar contains action buttons:
- Preview (Full page) — Opens your code in a new browser tab
- Format — Beautifies and indents your HTML and CSS code
- Sample — Loads example code to get you started
- Clear — Removes all code from the editor
- Import — Upload HTML files from your computer
- Export — Download your code as an HTML file
- Share — Generate a shareable link
Code Tabs
At the top of the editor, you'll find tabs for switching between HTML, CSS, and JavaScript. Click a tab to switch languages. The code for each language is saved separately.
Monaco Editor Features
ProLiveEditor uses Monaco Editor, the same editor that powers VS Code. You get these features for free:
- Syntax highlighting for HTML, CSS, and JavaScript
- Auto-completion and IntelliSense
- Bracket matching and auto-closing
- Multiple cursors and selection
- Find and replace (Ctrl/Cmd + F)
- Code folding
Live Preview
The live preview panel shows your rendered HTML, CSS, and JavaScript in real-time. Every change you make in the editor is immediately reflected in the preview.
How It Works
The preview uses an iframe with sandboxed JavaScript execution. Your HTML, CSS, and JavaScript are combined into a single document and rendered inside the iframe.
Desktop vs Mobile View
Click the "Desktop" / "Mobile" toggle in the header to switch between preview modes:
- Desktop — Full-width preview that fills the available space
- Mobile — iPhone-sized frame (375×667px) to test responsive designs
Resizable Panels
Drag the divider between the editor and preview to adjust their sizes. You can resize anywhere between 20% and 80% of the available width.
Import & Export
Importing Files
Click the "Import" button to upload an HTML file from your computer. ProLiveEditor will automatically:
- Extract HTML content from the
<body>tag - Extract CSS from
<style>tags - Extract JavaScript from
<script>tags
Each part is placed into the appropriate editor tab.
Exporting Files
Click the "Export" button to download your code as a complete, standalone HTML file. The exported file includes:
- A proper HTML5 document structure
- Your CSS in a
<style>tag - Your HTML in the
<body> - Your JavaScript in a
<script>tag
Console Panel
ProLiveEditor includes a built-in JavaScript console that captures output from your code.
Using the Console
The console panel appears at the bottom of the screen. Click on it to expand or collapse. The console captures:
console.log()— Regular log messages (green)console.warn()— Warning messages (yellow)console.error()— Error messages (red)
Error Handling
If your JavaScript has errors, they'll be automatically captured and displayed in the console. The console will open automatically when an error occurs.
// Try this in the JS tab:console.log('Hello from ProLiveEditor!');console.warn('This is a warning');console.error('This is an error');Clearing the Console
Click the "Clear" button in the console header, or use console.clear() in your JavaScript code.
Using Tailwind CSS
ProLiveEditor has built-in support for Tailwind CSS utility classes. You can start using Tailwind classes immediately in your HTML.
Quick Example
<div class="bg-blue-500 text-white p-4 rounded-lg">Hello, Tailwind!</div>Common Tailwind Classes
- Layout: flex, grid, block, hidden, container
- Spacing: p-4, m-2, px-6, py-3, gap-4
- Colors: bg-blue-500, text-gray-700, border-red-300
- Typography: text-xl, font-bold, text-center
- Borders: rounded-lg, border, border-2
- Effects: shadow-lg, opacity-50, hover:bg-blue-600
Keyboard Shortcuts
Speed up your workflow with these keyboard shortcuts.
| Action | Windows/Linux | Mac |
|---|---|---|
| Find | Ctrl + F | Cmd + F |
| Find and Replace | Ctrl + H | Cmd + H |
| Select All | Ctrl + A | Cmd + A |
| Undo | Ctrl + Z | Cmd + Z |
| Redo | Ctrl + Y | Cmd + Shift + Z |
| Duplicate Line | Shift + Alt + ↓ | Shift + Option + ↓ |
| Move Line Up/Down | Alt + ↑/↓ | Option + ↑/↓ |
| Comment Line | Ctrl + / | Cmd + / |
| Go to Line | Ctrl + G | Cmd + G |
Tips & Tricks
1. Use External Libraries
You can include external CSS and JavaScript libraries by adding CDN links in your HTML:
<!-- In your HTML --><link href="https://cdn.jsdelivr.net/npm/bootstrap@5/dist/css/bootstrap.min.css" rel="stylesheet"><script src="https://cdn.jsdelivr.net/npm/vue@3"></script>2. Test Responsive Designs
Use the mobile preview toggle to quickly test how your design looks on different screen sizes. Combine this with CSS media queries for full responsive testing.
3. Debug with Console
Use console.log() liberally to debug your JavaScript.
The built-in console shows all output without needing to open browser DevTools.
4. Format Regularly
Click the Format button to keep your code clean and readable. Well-formatted code is easier to debug and maintain.
5. Save Important Work
While auto-save keeps your code in local storage, use the Export feature to save important projects to your computer as backup.
6. Use Sample Code
The Sample button loads a complete example with HTML, CSS, and JavaScript. Study the code structure to learn best practices.