Romanize
Embeddable widget

Put the converter on your site

A self-contained Roman numeral converter you can drop into any page with one line of HTML. It runs entirely in the visitor's browser and adapts to light or dark mode.

Live preview of the widget as it will appear:

Basic embed

Copy this snippet into your HTML wherever you want the converter to appear.

<iframe
  src="https://romanize.net/widget.html"
  title="Roman numeral converter"
  width="440"
  height="150"
  style="border:0;max-width:100%"
  loading="lazy"
></iframe>

Responsive embed

Wrap the iframe to keep it centered and fluid inside a content column.

<div style="max-width:440px;margin:0 auto">
  <iframe
    src="https://romanize.net/widget.html"
    title="Roman numeral converter"
    width="100%"
    height="150"
    style="border:0"
    loading="lazy"
  ></iframe>
</div>

How it works

The widget loads a single static HTML file from Romanize. There is no external script to trust, no cookies, and nothing your visitors type is sent anywhere. The only network request is the one that loads the widget itself. A small "Powered by Romanize" link sits at the bottom so readers can find the full toolset.

Terms: the widget is free to embed on any site, personal or commercial. Please keep the "Powered by" link intact.

Prefer an API?

If you would rather fetch conversions as data, use the free JSON API instead. It returns the numeral, words and breakdown for any number.