[FREE TOOL]
Paste any URL. We fetch the page, find the third-party scripts it loads, and measure what each one actually weighs. Real bytes, not vendor claims.
Free · no signup · we fetch the page once and measure what it loads
Support chat is one of the few scripts you deliberately put on every page of your site, including the ones where a visitor is deciding whether to buy. On a phone on a slow connection, a few hundred kilobytes of JavaScript is the difference between a page that feels instant and one that stalls. The irony is that the widget exists to help people convert, so it should not be the thing that makes them leave.
Weight is not the only thing that matters, async loading and style isolation matter too, but it is the easiest to measure and the hardest to argue with. If you want the install side of it, the platform guides cover every stack, and how muro works explains what the widget does once it is on the page.
[FAQ]
It varies enormously. A lean widget is under 20 KB gzipped, while a full messenger suite can pull several hundred kilobytes of JavaScript, often split across multiple files loaded after the first one. The only honest answer for your site is to measure it, which is what this tool does.
It can. Any third-party script costs a DNS lookup, a connection and a download, and if it is not loaded async it can block rendering. The weight matters most on mobile connections and on pages where the visitor is deciding whether to stay. Async loading and a small file keep the cost close to zero.
We request the page once, read the third-party script tags in the returned HTML, then download each script and gzip it ourselves. Every script is measured with the same method, including muro’s, so the comparison is fair regardless of how each CDN serves its files.
This measures the scripts declared in the HTML. Many tools load a small loader first, which then pulls more code, images, fonts and web sockets at runtime. Those follow-on requests are not counted here, so treat this as the floor rather than the full picture.
About 9 KB gzipped. It is vanilla JavaScript with no framework runtime, loads async so it never blocks your content, and renders inside a Shadow DOM so it cannot collide with your CSS. It is measured with the same method this tool uses on everything else.