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Code editor in your browser · multiple tabs, syntax highlighting, markdown preview

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FAQ — Frequently Asked Questions about Free Online HTML Editor

Frequently Asked Questions — Free Online HTML Editor

What is this free online HTML editor?

A free browser-based HTML editor with live preview and syntax highlighting. Write HTML, CSS and JavaScript, see the result instantly in a side-by-side preview pane, and export your code — no install, no signup, no data leaves your device. It is powered by the industry-standard CodeMirror library and runs 100% client-side in your browser.

Does this HTML editor work without installing anything?

Yes. It runs entirely in your browser — nothing is installed on your computer, no files are uploaded to any server, and your HTML code stays private on your device. Just open the URL and start writing HTML immediately.

Can I preview my HTML in real time?

Yes. Click the live preview button or press Ctrl+P to open a side-by-side preview pane that renders your HTML as you type. This makes it ideal for rapid prototyping, learning HTML, or testing CSS styling changes instantly without switching between files and browser tabs.

What languages does this online HTML editor support?

Primarily HTML, CSS and JavaScript with full syntax highlighting, auto-closing tags, bracket matching and code folding. It also supports Python, JSON, Markdown, SQL, KQL, XML, PHP, Ruby, Java, C++ and many more — so you can use it as a general-purpose code editor too.

Is my HTML code automatically saved?

Yes. Auto-save is enabled by default and saves to your browser's localStorage. Your code is never sent to any server. It persists between visits on the same device, so you can close the tab and come back later without losing anything.

How do I save or export my HTML code?

Use File → Export (or Ctrl+S) to download your code as an .html file. You can also copy code to clipboard, or import existing HTML files via drag-and-drop. The export preserves your code exactly as written.

Can I use this HTML editor on mobile, tablet or Chromebook?

Yes. Because it is web-based and runs entirely in the browser, it works on Windows, Mac, Linux, Chromebook, iPad and mobile devices. No app download required — just open the URL in any modern browser.

How does this compare to CodePen, JSFiddle or W3Schools editor?

Unlike those tools, this editor requires no account, no login, and sends zero data to any server. Your code stays 100% on your device. It also works offline after loading, supports multi-tab editing, file import/export, and has a distraction-free terminal-themed interface. For quick HTML prototyping with full privacy, it is a lightweight alternative to cloud-based playgrounds.

Is this HTML editor really free?

Yes, completely free. No account, no paywall, no ads, no watermarks. It is one of the free browser-based tools at jasperbernaers.com.