Best Free HTML Editor
Write HTML with a live sandboxed preview — download the .html or open it in a new tab.
100% free
No signup
No watermark
Files processed in memory, never stored
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How it works
- Write HTML. Edit the markup (with CSS and JS) on the left.
- Preview live. The sandboxed preview updates as you type.
- Save it. Advanced options let you download the .html or open it in a new tab.
About this tool
Edit HTML on the left and see the result render instantly on the right, in a sandboxed preview that runs your markup, CSS and a bit of JavaScript safely. It’s the quickest way to try a snippet, prototype a small page, or check how some HTML behaves without spinning up a project. When it looks right, download the .html file or open it in a new tab. It all runs locally in your browser, so your code is never uploaded.
What people use it for
- Try an HTML/CSS snippet and see it render
- Prototype a small page without a project
- Test how some markup behaves before using it
- Teach or learn HTML with instant feedback
Frequently asked questions
Yes, in a sandboxed iframe — scripts and forms run so you can test interactivity, but the sandbox keeps that code isolated from the rest of the page.
No. Everything renders in your browser, so the HTML you write never leaves your device.
Yes — Advanced options lets you download the .html file or open the rendered page in a new tab.
Inline and internal CSS work fully. External resources load if the page allows it, the same as any HTML file you’d open locally.
It runs inside a sandboxed iframe, which limits what the previewed code can access, so testing snippets is safe.
Yes — client-side, no account, no limits, nothing stored.
Yes. It runs in your browser, so HTML Editor works on phones and tablets as well as desktop — there is no app to install.
Usually just a few seconds for a typical file — HTML Editor starts working the moment you give it your input.
Casual use is unlimited, under a generous fair-use cap that keeps it fast for everyone.
All modern browsers — Chrome, Safari, Firefox and Edge. HTML Editor needs nothing installed beyond the browser you already use.