For site owners
Add a free NAT type test to your website
Writing about game connections, routers or port forwarding? Let readers check their NAT type, public IP and IPv6 right on your page, instead of sending them away to test.
Your embed code
<iframe src="https://natchecker.com/embed/nat-test" title="NAT type test" width="100%" height="380" loading="lazy" style="display:block;max-width:440px;border:0;border-radius:14px"></iframe>
<p style="max-width:440px;margin:6px 0 0;font-size:12px">NAT test by <a href="https://natchecker.com/">NAT Checker</a></p>Live preview
This is the real widget. Press the button to run a test on your connection.
Built to sit quietly on someone else’s page
Light on your page
It loads as a small standalone page, without our site’s bundle. With loading="lazy", it waits until a visitor scrolls near it.
Runs only on a click
The test starts when a visitor presses the button, so nothing connects in the background while people read your page.
Private by design
The iframe keeps the result to itself. Your page and your scripts can’t read the visitor’s IP address or NAT type.
Fits your layout
It works from 280px wide, keeps one fixed height so your page doesn’t jump, and comes in light, dark or automatic themes.
Widget questions
Want the full version with explanations and detection history? Try the NAT Checker test.