Do I need to install an app to see my public IP?

No. A normal web page can display your public IP using JavaScript and public APIs. What Is My IP Address IP runs entirely in the browser.

Blog · How-to

How to check your public IP in a web browser

Short answer: Open What Is My IP Address IP, let the page load, then read or copy the IPv4 line (and IPv6 if shown). No download required.

Steps

Open the IP checker: go to the What Is My IP Address IP home page in Chrome, Safari, Firefox, or Edge.
Wait for detection—the page requests your public address from lookup APIs. IPv4 usually appears first.
If your network has public IPv6, a second line appears. If not, only IPv4 is shown.
Use Copy to place both lines on the clipboard, or select the text manually.
Optional: tap Refresh after switching networks or toggling VPN to see the new public IP.

Why HTTPS matters

Some mixed-content geo lookups only work on certain protocols. The main IP detection still works on secure sites; location cards may vary by browser and endpoint.