DNS Leak Test
Test for DNS leaks by generating unique subdomain queries. Detects if your DNS is leaking to ISP.
Tool Upgrade Coming Soon
This tool is currently a preview template. We are actively upgrading it to 100% blueprint compliance with 10 extra features. Like all UnQTools features, the upgraded version will run 100% locally in your browser with zero network requests.
About DNS Leak Test
Test for DNS leaks by generating unique subdomain queries. Detects if your DNS is leaking to ISP. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
What does this tool do?
Test for DNS leaks by generating unique subdomain queries. Detects if your DNS is leaking to ISP.
Is my data sent to a server?
No. This tool runs 100% in your browser. Nothing is uploaded, tracked, or stored remotely.
What extra features does this tool have?
Extras: (1) (1) DNS leak detection method explanation, (2) (2) Unique subdomain generator, (3) (3) Manual test instructions, (4) (4) Leak detection logic (if using VPN), (5) (5) DNS server identification, (6) (6) Multiple resolver check, (7) (7) Test history (localStorage), (8) (8) VPN privacy checklist, (9) (9) Copy test URL, (10) (10) Export results, (11) (11) PWA offline, (12) (12) Educational resources
Does this work offline?
Yes — install as a PWA and use it without network.
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