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 | HTML Editor Live Preview

Write, edit and run HTML, CSS and JavaScript code online

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

`F5`	Run in New Tab
`Ctrl`+`Enter`	Run in New Tab
`Ctrl`+`R`	Refresh Preview

`Ctrl`+`Tab`	Next Tab
`Ctrl`+`Shift`+`Tab`	Previous Tab
`Ctrl`+`1`	Go to Tab 1
`Ctrl`+`2`	Go to Tab 2
`Ctrl`+`3`	Go to Tab 3
`Ctrl`+`4`	Go to Tab 4
`Ctrl`+`5`	Go to Tab 5

`F1`	Keyboard Shortcuts
`Ctrl`+`,`	Settings
`Ctrl`+`Shift`+`,`	Ace Editor Settings
`Escape`	Close Dialog/Clear Selection