Is HCODX Editor free?

Yes, HCODX Editor is completely free. There are no plans, subscriptions, or hidden costs. All features including live preview, multi-file projects, compiler, formatter, minifier, and obfuscator are available at no charge, permanently.

Do I need to install anything to use the HTML editor?

No. HCODX runs entirely in your browser. Just open hcodx.com/editor in Chrome, Firefox, Safari, or Edge and start coding immediately. No download, no install, no extension needed.

How does the live preview work?

The live preview renders your HTML, CSS and JavaScript in a split-screen panel that updates in real time as you type. It runs inside an isolated iframe at preview.hcodx.com, keeping your editor and preview completely separate for security. You can toggle desktop, tablet, or mobile views, or use the full responsive design tester.

Can I use HCODX for multi-file HTML projects?

Yes. HCODX supports full multi-file project management. You can create and manage HTML, CSS, JavaScript, and asset files in a folder structure, switch between files using tabs, search across all files, and export the whole project as a ZIP archive.

Is my code private in HCODX?

Completely private. HCODX stores all your code locally in your browser using IndexedDB. Nothing is ever sent to, or stored on, any external server. All editing, preview, formatting, and compiling happens client-side on your device only.

What programming languages does HCODX support?

The main editor supports HTML, CSS, and JavaScript with live preview. The integrated compiler supports 70+ languages including Python, Java, C, C++, TypeScript, Go, Rust, PHP, Ruby, Swift, Kotlin, Bash, and more.

Can I use HCODX Editor offline?

Yes. HCODX is a Progressive Web App (PWA). After your first visit, it can be installed on desktop or mobile and works completely offline. Your projects and all editor features are available without an internet connection.

How do I format or minify my code?

Use the toolbar buttons or keyboard shortcuts: Ctrl+Shift+F to format, Ctrl+Shift+M to minify. HCODX uses Prettier for HTML/CSS/JS formatting with customizable style presets, and includes CSS and JavaScript minifiers with advanced compression options.

HCODX Editor — Free Online HTML CSS JavaScript IDE with Live Preview

Build, run, and test front-end code directly in your browser. No install. No signup. Free forever.

Please enable JavaScript to use the full HCODX editor experience.

Features: Live Preview, Syntax Highlighting, Multi-File Projects, 70+ Language Compiler, Console Output, Code Formatter, Minifier, Obfuscator, Responsive Tester, Dark & Light Themes, Auto-Save, PWA Offline Support.

HCODX Editor – Free Online HTML Runner with Live Preview IDE

Write, edit & preview HTML, CSS and JavaScript instantly in your browser

Get Started

New Project

Start with a fresh project

Continue from last session

Continue working on saved projects

Open Files

Import existing files

Open Folder

Import entire project folder

Quick Start

HTML + CSS + JS template

Templates

Pre-built project templates

Recent Projects

No recent projects yet

Your recent projects will appear here

Tips & Shortcuts

Ctrl+S

Save file

Ctrl+Shift+F

Format code

Alt+P

Toggle preview

F11

Fullscreen mode

Ctrl+N

New file

Ctrl+F

Find text

Ctrl+Z

Undo changes

F1

All shortcuts

Loading HTML Editor

Initializing components...

Validation Results

Code Snippets

Console 0

Saved

`Ctrl`+`N`	New File
`Ctrl`+`Shift`+`N`	New Folder
`Ctrl`+`Alt`+`N`	New Project
`Ctrl`+`O`	Open File/Folder
`Ctrl`+`Alt`+`O`	Open Project
`Ctrl`+`S`	Save File
`Ctrl`+`Shift`+`S`	Save All Files
`Ctrl`+`Alt`+`S`	Save As...
`Ctrl`+`E`	Export Project
`Ctrl`+`W`	Close File
`Ctrl`+`Shift`+`W`	Close All Files

`Ctrl`+`Z`	Undo
`Ctrl`+`Y`	Redo
`Ctrl`+`Shift`+`Z`	Undo Delete (Restore File/Folder)
`Ctrl`+`X`	Cut
`Ctrl`+`C`	Copy
`Ctrl`+`V`	Paste
`Ctrl`+`A`	Select All
`Ctrl`+`D`	Delete Line
`Ctrl`+`/`	Toggle Comment

`Ctrl`+`F`	Find
`Ctrl`+`H`	Find & Replace
`Ctrl`+`G`	Go to Line

`Ctrl`+`Shift`+`F`	Format Code
`Ctrl`+`Shift`+`M`	Minify Code
`Ctrl`+`Shift`+`V`	Validate HTML
`Ctrl`+`Shift`+`O`	Obfuscate JavaScript
`Ctrl`+`Shift`+`C`	Color System Designer
`Ctrl`+`Space`	Code Snippets
`Tab`	Indent
`Shift`+`Tab`	Outdent

`Ctrl`+`B`	Toggle Sidebar
`Alt`+`P`	Toggle Preview
`Alt`+`S`	Toggle Split View
`Ctrl`+`Shift`+`R`	Responsive Design Mode
`Ctrl`+`K`	Toggle Theme
`F11`	Fullscreen