HTML Tools
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HTML Preview

Paste HTML and CSS, click Preview — the result renders in a fully isolated iframe with no access to the html.com.ua page.

HTML
CSS
Preview

Use cases

  • Quickly checking a piece of HTML markup without creating a file
  • Showing a code snippet to a colleague or client
  • Checking how a CSS style looks before adding it to a project

FAQ

Does JavaScript run in the preview?

No. The iframe is deliberately configured with the most restrictive sandbox possible, with no scripts allowed — it's a pure HTML/CSS preview, no JS execution of any kind.

Does the preview have access to the site's cookies or localStorage?

No. A sandbox without allow-same-origin gives the iframe its own unique isolated origin, which cannot read html.com.ua's data.

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