Run a free DNS leak test online and compare DNS resolution through multiple secure DNS resolvers. Check whether your configured DNS service responds consistently.
Compare real DNS-over-HTTPS resolver responses.
These are responses actually received from the selected DoH endpoints.
A DNS leak can expose information about which DNS service is handling your domain-name requests. This can matter when you are using a VPN or privacy-focused network configuration.
Our DNS Leak Test provides a browser-based DNS diagnostic by sending the same DNS lookup through supported DNS-over-HTTPS resolvers and comparing the returned answers.
DNS, or Domain Name System, converts domain names such as example.com into IP addresses. Normally, your device sends DNS requests to a configured DNS resolver.
A DNS leak can occur when DNS requests are handled outside the DNS path you expected, for example when a VPN is connected but DNS requests continue to use another resolver.
The tool sends DNS-over-HTTPS queries to supported public DNS resolver endpoints. It compares the DNS responses returned for the same test domains.
The test does not claim to know your operating system's configured DNS server when the browser does not expose that information. Instead, it clearly reports what the browser-based test actually measured.
If you are testing a VPN, first connect to your VPN and then run this test. A browser-based DoH test is different from a complete operating-system DNS leak audit, so VPN users should also use their VPN provider's official leak-testing method when available.
Traditional DNS commonly uses unencrypted DNS transport. DNS-over-HTTPS, often called DoH, sends DNS queries through HTTPS. This can provide additional transport privacy, although the resolver still receives the DNS request.
A normal webpage cannot directly inspect your operating system's DNS configuration. Websites can perform DNS-related tests using external infrastructure, but the results depend on the testing method and browser/network configuration.
A resolver that successfully answers a DoH query is not automatically evidence that your system is leaking DNS requests. This distinction is important because browser DNS-over-HTTPS testing and operating-system DNS leak detection are different tests.
A DNS leak test checks DNS resolution behavior and can help identify unexpected DNS handling when using privacy tools such as VPNs.
Not necessarily. A browser cannot directly expose the operating system's DNS configuration. This tool reports the DNS-over-HTTPS tests it actually performs.
Yes. The tool is designed to be free to use online.
A DNS test is different from an IP address test. This tool focuses on DNS resolution rather than pretending to identify your ISP's DNS configuration.
Yes. You can run the test while connected to a VPN and compare the behavior before and after connecting.
No. DNS-over-HTTPS encrypts DNS queries between the client and the DoH resolver. A VPN provides a broader network tunnel and can route other traffic as well.
A DNS leak can occur when DNS requests are handled by a resolver outside the DNS path expected by the user, such as when using a VPN.
A DNS leak test can use DNS queries and external resolver infrastructure to analyze DNS resolution behavior.
No. Standard browser APIs do not provide direct access to the operating system's DNS configuration.
No. The tool displays responses obtained from the DNS-over-HTTPS endpoints used by the test.
Yes. Testing both VPN-off and VPN-on conditions can help you compare DNS behavior.
DNS-over-HTTPS encrypts DNS queries between the client and the DoH resolver, but the resolver itself can still process the DNS request.
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