HTML Live Preview — Test HTML Instantly in the Browser

When to Use HTML Live Preview

The HTML Live Preview is your instant scratchpad for anything HTML — no text editor, no local server, no file system required. It runs entirely in your browser.

Common use cases

Learning HTML — Type a tag, see what it does immediately. Ideal for beginners and students.
Prototyping layouts — Sketch a quick flexbox or grid layout before committing to a codebase.
Testing email HTML — Paste your email template to check basic rendering (note: email clients have their own quirks).
Reproducing bugs — Create a minimal reproduction of an HTML/CSS issue to share with teammates.
Trying out CSS — Experiment with CSS variables, animations, and selectors without touching your project files.

Tips

Toggle Live preview off if your snippet has side effects (like alert()) to control when it runs.
The preview is sandboxed — it cannot access parent page cookies, localStorage, or make cross-origin requests.
Include a full <!DOCTYPE html> declaration for the most accurate rendering.
CSS custom properties (--my-var) and modern layout features like CSS Grid work in the preview.

HTML Patterns to Get You Started

Pattern	Snippet
Centred flex container	`display:flex; justify-content:center; align-items:center;`
Responsive two-column grid	`display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:1rem;`
CSS reset	`, ::before, *::after { box-sizing:border-box; margin:0; padding:0; }`
Full-screen hero section	`min-height:100vh; display:flex; flex-direction:column; justify-content:center;`
Accessible button	`<button type="button" aria-label="Close">✕</button>`
Responsive image	`<img src="…" alt="…" style="max-width:100%;height:auto;">`