HTML Preview – Free Online HTML Preview Tool

Live HTML preview with device size simulation. Split view, code view, or preview only. 5 template layouts. Open file or download.

Features

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See HTML rendered in real time as you type or paste. No saving needed.

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Simulate desktop, tablet, and mobile viewports for responsive testing.

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Split (side-by-side), code only, or preview only — choose your workflow.

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Start with blank, blog, dashboard, landing, or portfolio HTML templates.

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Open local HTML files directly, or download your preview as an HTML file.

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Preview runs in sandboxed iframe. No external resource loading.

Type HTML directly, paste from clipboard, or load a template.

Select split, code-only, or preview-only mode.

Toggle device size buttons to see how it looks on desktop, tablet, mobile.

Download the HTML file or open a new one.

How does the live preview work?

The HTML is rendered in a sandboxed iframe using srcdoc. Updates happen instantly on every keystroke with no server round-trip.

Can I test responsive design?

Yes. Device size buttons simulate common viewport widths: desktop (1200px), tablet (768px), and mobile (375px).

Are external resources loaded?

External CSS, JS, images, and fonts are blocked by default for privacy. Toggle external resource loading in settings if needed.

What templates are available?

5 starter templates: Blank (empty), Blog (article layout), Dashboard (sidebar layout), Landing (hero + features), Portfolio (image grid).

Is my HTML sent to a server?

No. All rendering happens locally in your browser. Your HTML never leaves your device.