HTML Previewer

Write HTML and see a live rendered preview side by side

What is it and how does it work?

An HTML previewer takes raw HTML markup and renders it live, so you can see the actual page your code produces without creating a file, saving it and opening it in a browser. You paste or type HTML on one side and the rendered result appears on the other, updating as you edit. It is the fastest way to check a snippet, test how an email template degrades, or confirm that a fragment of markup copied from somewhere actually does what you expect.

Because it renders the markup exactly as a browser would, it is useful for spotting structural problems that are invisible in source — an unclosed tag that swallows everything after it, a table whose cells collapse, or inline styles that do not apply because of a typo. This tool runs the preview in your own browser, so the HTML never leaves your machine, and you can iterate freely on layouts, components or learning exercises before moving the code into a real project.

Common use cases

• Testing an email template: paste table-based HTML and inline styles to see how it renders, since email clients ignore external CSS.
• Checking a copied snippet: drop in markup from a tutorial or component library to confirm it produces the expected output before integrating it.
• Learning HTML: type tags and attributes and watch the result appear instantly, which makes the relationship between code and output obvious.

Frequently asked questions

Will external CSS and JavaScript work in the preview?

Inline styles and styles inside a <style> tag render directly. External resources linked by URL load only if the page allows them; for reliable results, especially with email templates, keep styles inline within the markup you paste.

Is my HTML sent to a server?

No. The markup is rendered locally in your browser, so nothing you paste is uploaded. You can safely preview internal templates or unreleased page code.

Why does my page look different here than in production?

A preview shows the markup in isolation, without your site's global stylesheet, fonts or scripts. Differences usually mean the element depends on CSS defined elsewhere; paste the relevant styles alongside the markup to reproduce the real look.

Can I preview a full HTML document with head and body?

Yes — you can paste a complete document or just a fragment. A fragment is rendered inside a default page context, which is ideal for testing individual components or sections.

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