ToolBoost Open editor

HTML & CSS editor
with live preview

Write HTML, CSS and JavaScript side by side and see the page update as you code. Ask the AI to build a layout, fix styling or make it responsive.

Start coding free →

No install · No account · Free

index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <style>
    h1 { color: #C05A31; font-family: serif; }
  </style>
</head>
<body>
  <h1>Hello from ToolBoost</h1>
</body>
</html>

Features

Live preview

Run your HTML and see the rendered page instantly, with CSS and JavaScript files injected automatically.

AI web design help

Ask for "a responsive navbar" or "center this div" and review the change as a diff before applying.

Export as .zip

Download a single file or your whole project and host it anywhere.

How it works

  1. Open the ToolBoost editor.
  2. Create index.html (and optional style.css / script.js).
  3. Press Run to open the live preview.

Tutorial: build a web page with live preview

You can build and test a complete website without a local server. ToolBoost combines your HTML, CSS and JavaScript files and renders them in a live preview when you press Run.

1. Start with structure. Create index.html and add a heading, a paragraph and a button. Press Run to see it rendered.

2. Add styles. Create style.css. ToolBoost injects it into the page automatically — no <link> tag needed. Try Flexbox or Grid and re-run to see the layout change.

3. Add behavior. Create script.js for click handlers, form validation or DOM changes. Errors appear in the output panel.

4. Let AI do the tedious parts. Ask for "a responsive navbar with a mobile menu", "center this card vertically" or "make this page dark mode". Review every change as a diff before applying.

5. Ship it. Export the project as a .zip and upload it to Netlify, GitHub Pages or any static host.

FAQ

Is this HTML editor free?

Yes. No payment and no account needed.

Can beginners use it?

Yes. The AI assistant can explain any tag or CSS rule in plain language.

Can I download my website?

Yes, export all files as a .zip with one click.

More editors