Test your VPN, DNS, and WebRTC in the browser

NetScope is a browser toolbox to test a VPN, answer what is my DNS, run a WebRTC test for WebRTC leaks, check torrent-related IP exposure, and look up IP, DNS, and WHOIS records.

Core network tools

Check your public IP address — Check the public IPv4 or IPv6 address your browser exposes, then compare location, ASN, and ISP details from multiple lookup sources.
Test for DNS leaks — Run a DNS leak test to see which resolvers your browser uses and whether DNS lookups appear to leave a VPN or proxy path.
Standard vs extended DNS leak tests — Compare a one-round standard DNS leak test with a six-round extended test that is more likely to reveal extra anycast resolvers.
What is a DNS leak? — A DNS leak happens when domain lookups leave the VPN path and reach a resolver you did not intend to use, often your ISP.
How to fix a DNS leak — Fix a DNS leak by making the VPN the only DNS path: disable browser secure DNS, flush caches, and confirm the adapter is not still using ISP resolvers.
WebRTC leak test — Check for a WebRTC leak: see which local and public IPs WebRTC can expose, including WebRTC leaks that bypass a VPN or proxy on ordinary web requests.
Measure your internet connection — Measure download speed, upload speed, latency, and jitter from your browser using Cloudflare’s edge network.
Look up domain and IP registration data — Look up published WHOIS and RDAP records for a domain name or public IP address, including registrar and network registration fields.
Compare DNS resolver results — Compare live DNS answers from multiple public resolvers to troubleshoot inconsistent records, filtering, or stale cache.
What is my DNS? — What is my DNS, and whats my DNS right now? This check lists the resolver IPs your browser actually uses so you can confirm VPN DNS or ISP resolvers.
WebRTC test — Run a WebRTC test to see local and public IP candidates this browser gathers over STUN, including addresses that can bypass a proxy.
Torrent leak test — Run a torrent leak test in the browser: compare your public IP and WebRTC candidates so a VPN used with torrents is not exposing a second address.
Test your VPN — Test a VPN in the browser: confirm the public IP, run a DNS leak test, and run a WebRTC test so traffic, DNS, and peer connections stay on the tunnel.
Teste vazamento de DNS — Faça um teste de vazamento de DNS no navegador e veja quais servidores DNS resolvem os nomes. Compare com a VPN para saber se o provedor local ainda recebe as consultas.
DNS泄漏测试 — 进行 DNS泄漏测试，查看当前浏览器的 DNS 解析器地址，并对照 VPN 设置，判断域名查询是否仍走本地运营商。