DNS Leak Test
Test if your VPN is leaking DNS requests to your ISP. Detect DNS leaks that expose your browsing activity even when using a VPN. Free DNS leak checker.
What Is DNS Leak Test?
A DNS leak test checks whether your DNS queries are being sent through your VPN tunnel or leaking to your ISP. Even with a VPN active, DNS leaks can expose every website you visit to your Internet Service Provider, defeating the purpose of using a VPN for privacy.
How to Use
Click the test button to send DNS queries through special test domains. The tool identifies which DNS resolvers handle your queries. If you see your ISP's DNS servers instead of your VPN provider's, you have a DNS leak.
Use Cases
- Verify your VPN is properly tunneling DNS queries
- Check if your ISP can see which websites you visit
- Test DNS configuration after changing DNS servers
- Confirm privacy settings on a new VPN connection
- Debug VPN connectivity issues
Frequently Asked Questions
What is a DNS leak?
A DNS leak occurs when your DNS queries bypass your VPN tunnel and go directly to your ISP's DNS servers. This means your ISP can see every domain you visit, even though your other traffic is encrypted through the VPN.
How do I fix a DNS leak?
Enable DNS leak protection in your VPN app settings. Alternatively, manually set your DNS servers to your VPN provider's DNS or use privacy-focused DNS like 1.1.1.1 (Cloudflare) or 9.9.9.9 (Quad9). On Windows, disable "Smart Multi-Homed Name Resolution."
Can my ISP see my browsing with a VPN?
If you have a DNS leak, yes. Your ISP can see the domain names you resolve through their DNS servers. Without a DNS leak, your ISP can only see that you are connected to a VPN server but cannot see which websites you visit.