Welcome to HCODX

Your complete online code editor with ACE editor integration, live preview, multi-file support, and professional development tools. Zero installation required.

100%

Free Forever

15+

Core Features

60s

Auto-Save

∞

Projects & Files

Getting Started

Follow these steps to start coding with HCODX

Launch HCODX

Visit hcodx.com in any modern browser. You'll see a beautiful launcher screen with multiple options:

New Project: Start with a blank canvas
Open Project: Load saved projects from browser storage
Import Files: Drag & drop existing HTML/CSS/JS files
Import Folder: Upload entire project folders
Quick HTML: Start with HTML+CSS+JS template
Templates: Choose from pre-built project templates

Understand the Interface

HCODX features a professional 3-panel layout powered by ACE editor:

Left Panel: File explorer - create, organize, and manage files/folders
Center Panel: ACE code editor with syntax highlighting and autocomplete
Right Panel: Live preview iframe - see changes instantly
Top Toolbar: All tools and actions in one place

Create & Organize Files

Use the file management system:

Click New File or press Ctrl+N
Name your file with proper extension (.html, .css, .js)
Organize files in folders for complex projects
Files save automatically every 60 seconds
Drag files to reorder them in the file tree

Write Code with ACE Editor

Enjoy professional coding features:

Syntax Highlighting: Color-coded HTML, CSS, JavaScript
Auto-Complete: Smart code completion as you type
Code Folding: Collapse/expand code blocks
Multiple Cursors: Edit multiple lines simultaneously
Search & Replace: Ctrl+F to find, Ctrl+H to replace
Undo/Redo: Full history with Ctrl+Z and Ctrl+Y

Use Live Preview

See your work in real-time:

Preview updates automatically as you type
Toggle preview panel with Alt+P
Use responsive design tester for mobile/tablet views
Preview shows exactly how your site will look
Console logs visible for JavaScript debugging

Save & Export

Multiple ways to preserve your work:

Auto-Save: Automatic saving every 60 seconds to browser
Manual Save: Press Ctrl+S anytime
Save Project: Store complete project with all files
Export Project: Download as .zip file
Export File: Download individual files

Core Features

Professional tools for modern web development

ACE Editor Integration

Industry-standard ACE editor with:

Syntax highlighting for HTML/CSS/JS
Intelligent code completion
Code folding and indentation
Multiple cursor editing
Customizable editor settings

Live Preview

Instant visual feedback:

Real-time updates as you type
Full HTML rendering
CSS styling applied live
JavaScript execution
Console output visible

Multi-File Projects

Complete project management:

Unlimited files per project
Folder organization
File tree navigation
Drag & drop files
Import entire folders

Auto-Save System

Never lose your work:

Saves every 60 seconds automatically
Stores in browser localStorage
Manual save with Ctrl+S
Project history preserved
Recovery from crashes

Responsive Design Tester

Test on multiple devices:

Desktop view (1920px)
Tablet view (768px)
Mobile view (375px)
Custom viewport sizes
Orientation toggle

Code Formatter (Prettier)

Professional code formatting:

Prettier integration
Format HTML, CSS, JavaScript
Keyboard shortcut: Ctrl+Shift+F
Consistent code style
Customizable options

Code Minification

Optimize for production:

Minify HTML, CSS, JavaScript
Remove whitespace & comments
Reduce file size
Keyboard shortcut: Ctrl+Shift+M
Production-ready output

Code Obfuscation

Protect your JavaScript:

JavaScript obfuscator
Variable name mangling
String encoding
Keyboard shortcut: Ctrl+Shift+O
Code protection

Code Validation

Catch errors early:

HTML validator
CSS validator
JavaScript linter
Keyboard shortcut: Ctrl+Shift+V
Error highlighting

Color System Designer

Integrated color tools:

Professional color picker
Color scheme generator
Gradient creator
Palette management
Insert colors into code

Search & Replace

Powerful find and replace:

Find: Ctrl+F
Replace: Ctrl+H
Case-sensitive search
Regex support
Search all files

Code Snippets

Quick code templates:

HTML boilerplate
CSS reset
JavaScript functions
Custom snippets
Fast insertion

Clipboard Operations

Standard editing tools:

Cut: Ctrl+X
Copy: Ctrl+C
Paste: Ctrl+V
Select All: Ctrl+A
Multiple selections

Theme Support

Customizable appearance:

Dark theme
Light theme (default)
ACE editor themes
Syntax color schemes
Persistent preferences

Editor Settings

Customize your workflow:

Font size adjustment
Tab size configuration
Word wrap toggle
Line numbers
Auto-indentation

Keyboard Shortcuts

Master HCODX with these powerful shortcuts

File Operations

Ctrl+N - New File
Ctrl+S - Save File
Ctrl+O - Open Files/Folder
F1 - Keyboard Shortcuts

Editing

Ctrl+Z - Undo
Ctrl+Y - Redo
Ctrl+X - Cut
Ctrl+C - Copy
Ctrl+V - Paste
Ctrl+A - Select All

Search

Ctrl+F - Find
Ctrl+H - Replace
F3 - Find Next
Shift+F3 - Find Previous

Code Tools

Ctrl+Shift+F - Format Code
Ctrl+Shift+M - Minify Code
Ctrl+Shift+O - Obfuscate JS
Ctrl+Shift+V - Validate HTML

View

Alt+P - Toggle Preview
F11 - Fullscreen Mode
Ctrl++ - Zoom In
Ctrl+- - Zoom Out

ACE Editor

Tab - Indent
Shift+Tab - Outdent
Ctrl+/ - Comment Line
Ctrl+D - Delete Line
Alt+Up/Down - Move Line

Advanced Features

Professional workflows and power user tools

Project Organization

Build complex projects with proper structure:

Create folders for CSS, JS, images, etc.
Use meaningful file names (index.html, style.css, script.js)
Link files with relative paths
Keep projects organized by purpose
Use the file tree to navigate quickly

Code Formatting Workflow

Maintain clean, readable code:

Write code naturally without worrying about formatting
Press Ctrl+Shift+F to format with Prettier
Configure formatting options in settings
Format applies HTML, CSS, and JavaScript
Consistent code style across all files

Production Optimization

Prepare code for deployment:

Validate HTML/CSS/JS for errors (Ctrl+Shift+V)
Format code for readability (Ctrl+Shift+F)
Minify files to reduce size (Ctrl+Shift+M)
Obfuscate JavaScript for protection (Ctrl+Shift+O)
Export optimized project as ZIP

Responsive Development

Build mobile-first websites:

Use the responsive design tester
Test on mobile (375px), tablet (768px), desktop (1920px)
Use CSS media queries
Check all breakpoints before deployment
Ensure touch-friendly UI elements

Color Design Integration

Use the built-in Color System Designer:

Click the palette icon to open color tools
Pick colors, create schemes, mix colors
Generate gradients and palettes
Test accessibility with WCAG checker
Insert colors directly into your code

Backup & Version Control

Never lose your work:

Auto-save runs every 60 seconds to browser
Export projects regularly as ZIP backups
Save different versions with date stamps
Keep critical projects in multiple locations
Use manual save (Ctrl+S) before big changes

Frequently Asked Questions

Everything you need to know about HCODX

Is HCODX really free?

Yes! HCODX is 100% free forever. All features are available to everyone with no premium plans, no hidden fees, and no feature limitations. We believe professional web development tools should be accessible to all.

Do I need to create an account?

No account required! Your projects are saved locally in your browser's storage. You have complete privacy and control. You can export your projects as files anytime for backup or sharing.

What browsers are supported?

HCODX works on all modern browsers: Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your browser. Mobile browsers are also supported.

Can I use it offline?

Yes! HCODX is a Progressive Web App (PWA). Once loaded, it works offline. Your projects are stored locally in your browser, so you can code without an internet connection.

How does auto-save work?

Auto-save runs every 60 seconds, saving your work to browser localStorage. You can also manually save anytime with Ctrl+S. Your work persists even if you close the browser or refresh the page.

Can I import existing projects?

Absolutely! You can import files (drag & drop) or entire folders. HCODX supports importing complete projects with all HTML, CSS, JavaScript, and image files. The folder structure is preserved.

What's the difference between minify and obfuscate?

Minification removes whitespace and comments to reduce file size for faster loading. Obfuscation makes JavaScript code harder to read and understand, providing some protection against code theft. Use minify for all code, obfuscate for sensitive JavaScript.

Can I use external libraries like jQuery or Bootstrap?

Yes! Include external libraries via CDN links in your HTML. Add script and link tags just like you would in a regular website. Popular CDNs like cdnjs, unpkg, and jsDelivr all work perfectly.

How do I share my projects?

Export your project as a ZIP file and share it via email, cloud storage, or messaging. Others can import the ZIP file into their HCODX editor. Alternatively, deploy your project to hosting services like GitHub Pages, Netlify, or Vercel.

Is my code private and secure?

Absolutely! Your code never leaves your browser. Everything runs locally. We don't store, access, or transmit your projects. Your work is completely private and secure on your device.

What's the maximum project size?

Limited only by your browser's localStorage (typically 5-10MB). This is more than enough for most web projects. For larger projects with many images, consider using external hosting for assets.

How do I access the Color System Designer?

Click the palette icon in the toolbar or use the keyboard shortcut. The Color System Designer opens in a full-screen overlay with professional color tools, palette generators, gradient creators, and WCAG accessibility checkers.

Ready to Start Coding?

Join thousands of developers using HCODX for professional web development

Launch HCODX Now