JoliTools

HTML Previewer

Preview HTML instantly in a sandbox

Scripts are disabled in the preview

The preview runs in a sandboxed iframe, so scripts and other active content will not run. This keeps the preview safe.

Rendering happens entirely in your browser. Nothing is sent or stored anywhere.

About this tool

Testing an HTML snippet should not require spinning up a file and a server. Paste it here and see it rendered instantly.

The preview runs in a locked-down sandbox (scripts disabled), so even untrusted snippets are safe to inspect. Perfect for email templates, embeds and quick experiments.

How to use the html previewer

  1. 1Paste your HTML or import a file.
  2. 2See the live rendered preview instantly.
  3. 3Use Format, Highlight and folding to inspect the code, then Export it.

Frequently asked questions

Yes. It renders in a sandboxed iframe with scripts disabled, so untrusted snippets cannot run code or escape.

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Part of Developer Tools on JoliTools, free tools, no sign-up.