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HTML editor online

HTML, CSS, and JavaScript in one editor: preview, full-screen mode, Desktop, Tablet, and Mobile checks, a tag panel, and a detachable editor window. Download the project as a single .html file or a ZIP archive.

Editing HTML · CSS · JS
Preview Desktop · Tablet · Mobile
Import .html · .css · .js
Export index.html · ZIP
Project
· index.html · style.css · script.js · 0 KB · Changes saved
Auto update
Structure
Headings
Text
Links and media
Lists
Forms and tables
HTML · 1 line · 0 chars 
1
Ln 1, Col 1 · 2 spaces · UTF-8 Ready
Preview · page result
About the tool

Online HTML, CSS and JavaScript editor with preview

HTML Online Editor is a free browser-based code editor with no sign-up and no installation. Write HTML, CSS and JavaScript in separate tabs, preview the result, upload local files, download a single index.html file or export the project as a ZIP archive.

What the editor does

  • Preview. With auto update enabled, the result changes while you type. If auto update is off, use the "Update" button.
  • Three project files. index.html, style.css and script.js stay separate. Preview temporarily combines them in the browser, "Download" and "Copy project" build one .html file, and "Export" downloads a ZIP with all three files.
  • Responsive preview. Switch between Desktop, Tablet and Mobile to check the layout on different screen sizes.
  • Tags in one click. Use the "Show tags" panel to add HTML tags to your code with one click.
  • File upload. Add local .html, .css and .js files from your computer and continue editing them in the browser.
  • Auto-save. Code is stored locally in your browser, so after reloading the page you can return to the latest saved version.

Who it is for

The editor is useful for beginners, frontend developers, teachers and anyone who needs to quickly test an HTML fragment without setting up an IDE. It works well for learning examples, emails, small prototypes and code checks.

Why it is convenient

The editor works in any modern browser: Chrome, Firefox, Safari, Edge and Yandex Browser. Everything runs locally: nothing is sent to a server, and files stay on your computer. The interface is responsive, so you can edit HTML online from a laptop, tablet or phone.

FAQ

Do I need an account to use the editor?

No. Open the page and start working right away. No account is required.

Where is my code stored?

In your browser's local storage. Nothing is sent to a server. Use "Download" to save one HTML file, or "Export" to save the three project files separately.

Can I upload my own files?

Yes. The editor supports .html, .css and .js files, and you can choose multiple files at once.

Does JavaScript run in the preview?

Yes. JavaScript runs only inside an isolated sandboxed iframe, separate from the editor interface.

Can I turn off auto update?

Yes. For larger code fragments, disable auto update in the toolbar and refresh the preview with the "Update" button.