About This HTML, CSS & JavaScript Editor
WebFiddle's HTML Editor is a lightweight, browser-based sandbox for writing and testing HTML5, CSS3, and JavaScript (ES6+). See results instantly in the live preview pane — perfect for rapid prototyping, debugging, and learning web development.
Key Features
- check_circleInstant live preview as you type
- check_circleSeparate HTML, CSS, and JS editors
- check_circleBuilt-in JavaScript console for debugging
- check_circleLibrary injector: Tailwind CSS, Bootstrap, FontAwesome, React, and more
- check_circleExport as HTML file or share via unique URL
- check_circleTemplate library for quick starts
How to Use
- 1Write HTML in the top-left pane.
- 2Style with CSS in the middle pane.
- 3Add JavaScript in the JS pane.
- 4Click 'Run' or let auto-preview refresh the output.
- 5Use the Console tab to debug runtime errors.
Frequently Asked Questions
Yes! Use the Library button to inject Tailwind CSS, Bootstrap, FontAwesome, React, Three.js, and Anime.js with one click.
Yes. The preview pane updates automatically as you type with a 500ms debounce.
Absolutely. Click the Share button to generate a unique URL that encodes your HTML, CSS, and JS.
Embed this sandbox
Drop this into any page and readers can run code without leaving it. The snippet travels in the URL, so there is nothing to host and no account to create. Open the sandbox, write your example, press Share, then paste that link’s query onto the embed URL to preload it.
<iframe src="https://webfiddle.xyz/embed/html" width="100%" height="480" loading="lazy"
style="border:1px solid #ddd;border-radius:8px"
title="WebFiddle html sandbox"></iframe>