Check if your VPN or proxy is leaking DNS requests. Detect exposed DNS servers, verify your privacy protection, and identify potential leaks instantly.
Identify which DNS servers are handling your requests. See the exact IP addresses, providers, and locations of every DNS resolver your device is using.
Detect if DNS queries are bypassing your VPN or proxy tunnel. Leaked DNS requests can expose your browsing history to your ISP even when connected to a VPN.
Test against multiple DNS resolution paths simultaneously. Verify that all queries route through your VPN tunnel, not just some of them.
Map DNS server locations geographically. If your DNS servers are in a different country than your VPN endpoint, you may have a leak worth investigating.
Confirm that your VPN or proxy is properly tunneling DNS traffic. Get a clear pass/fail assessment of your connection’s DNS privacy status.
Get instant DNS leak analysis as soon as you run the test. No waiting, no queues — results appear in seconds with full detail on every detected server.
Open this page while connected to your VPN or proxy. The tool automatically detects your current IP address and apparent location to establish a baseline.
Click the "Run DNS Leak Test" button. The tool checks multiple DNS resolution paths to identify which DNS servers are handling your queries and whether any are leaking outside your tunnel.
See a detailed breakdown of every DNS server detected, including IP addresses, providers, countries, and leak status. A secure result means all DNS queries route through your VPN.
Every time you visit a website, your device sends a DNS (Domain Name System) query to translate the domain name into an IP address. Normally, when you use a VPN or proxy, all your traffic — including DNS queries — should travel through the encrypted tunnel. A DNS leak occurs when these queries bypass the tunnel and are sent directly to your ISP's DNS servers or another third-party resolver.
This is a serious privacy problem. Even if your IP address is hidden behind a VPN, leaked DNS queries create a complete record of every website you visit. Your ISP, network administrator, or anyone with access to the DNS server logs can see your entire browsing history in plain text.
DNS leaks are surprisingly common. They can be caused by misconfigured VPN software, operating system quirks that override VPN routing rules, IPv6 traffic that isn't tunneled, or browser features like WebRTC that can bypass proxy settings. Some VPN providers handle DNS internally, while others rely on your system's default DNS configuration — which often points straight back to your ISP.
For anyone using a VPN or proxy for privacy — whether for personal browsing, research, or business operations — regular DNS leak testing is essential. A single leak can undermine your entire privacy setup without any visible indication that something is wrong. Our free DNS leak test helps you verify that your connection is truly private and that no DNS queries are escaping your encrypted tunnel.
A DNS leak occurs when your DNS queries are sent outside of your VPN or proxy tunnel, typically to your ISP’s DNS servers. This means your ISP (or anyone monitoring your network) can see which websites you visit, even though your other traffic is encrypted through the VPN.
A DNS leak test works by making DNS queries and then checking which DNS servers resolved them. If the DNS servers belong to your VPN provider, your connection is secure. If they belong to your ISP or a third party, you have a DNS leak that needs to be fixed.
DNS leaks can happen for several reasons: misconfigured VPN software, operating system DNS settings overriding VPN routes, IPv6 traffic bypassing the VPN tunnel, WebRTC leaks in browsers, or the VPN client failing to force all DNS queries through the tunnel.
To fix a DNS leak, enable the DNS leak protection setting in your VPN client if available. You can also manually set your DNS servers to a privacy-focused provider like Cloudflare (1.1.1.1) or Google (8.8.8.8), disable IPv6 if your VPN doesn’t support it, or use a VPN with built-in DNS servers.
Yes, most standard HTTP/SOCKS proxies do not handle DNS resolution, meaning your DNS queries go directly to your ISP’s servers while only your HTTP traffic goes through the proxy. SOCKS5 proxies with remote DNS resolution and premium proxy services like SpyderProxy handle DNS properly to prevent leaks.
If you use a VPN or proxy for privacy, yes. DNS leaks undermine the entire purpose of your encrypted tunnel by exposing your browsing activity to your ISP. Even if your IP address is hidden, leaked DNS queries create a detailed log of every website you visit.
SpyderProxy handles DNS resolution server-side — zero leaks, guaranteed.
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