WebRTC leak test
Run the appropriate check, then compare the result with the connection you intended to use.
Check addresses exposed through WebRTC
This browser check asks a Google STUN server which address it can see. It does not access your camera or microphone, and results stay in this page.
A local address is not your internet address. A different public address deserves investigation, but can also reflect IPv4/IPv6 or split tunnelling. This is not a DNS leak test or an overall security verdict.
How to read a result
Keep the same browser and network for both runs. Note your public IP with the VPN disconnected, connect in the VPN app, then repeat the test. Compare the observed addresses and operators with what your provider documents.
A different address is a clue to investigate. It is not, on its own, a security diagnosis. Browser DNS settings, IPv4 and IPv6, split tunnelling and other extensions can change the result.