DNS Leak Test
Network ToolsRun a free DNS Leak Test to check if your DNS requests are exposed. Find out which DNS servers your device is using, and see if your ISP can still track your browsing activity while on a VPN.
How to Use DNS Leak Test
Frequently Asked Questions
What is a DNS leak?
A DNS leak is a vulnerabiliy where your device uses your ISP's DNS servers to send queries even when you are using a VPN to tunnel your internet traffic. When this happens, Even if you use a VPN, your ISP can still see every website you visit compromising your privacy and defeating the purpose of the VPN.
How do I know if my DNS is leaking?
Run a DNS leak test and check the DNS servers found. If your results show your ISP’s DNS instead of your VPN or secure DNS resolver, you are leaking.
Can my ISP track me through DNS?
Yes. The DNS server you use can log every website request. Even if a site is HTTPS encrypted, DNS leaks expose the domains you visit.
Does a VPN stop DNS leaks?
Good VPNs route DNS traffic through private resolvers. However, some devices still leak through WebRTC, IPv6, or misconfigured networks.
What causes DNS leaks?
Common causes include WebRTC leaks in browsers, system DNS overrides, IPv6 leaks, faulty VPN apps, or manually set DNS on the device.
How do I fix a DNS leak?
Use a VPN with DNS leak protection, disable WebRTC in browsers, enable DNS over HTTPS, or switch to a secure DNS provider like Cloudflare or Google.
What is a WebRTC DNS leak?
WebRTC can bypass VPN tunnels and reveal your IP and DNS resolver directly through the browser. This is why browser-based DNS tests are important.