Terms of Service

These terms govern your use of TestsDns at testsdns.com (“the site,” “we,” “us”). By using the site or running the DNS speed test, you agree to them. If you don't agree, please don't use the site.

The tool is free and provided “as is”

TestsDns is a free tool. There's no account, no paywall, and no premium tier. We provide it “as is” and “as available,” without any promise that it will be uninterrupted, error-free, or available at any particular time. We may change, limit, or discontinue any part of the site — including specific resolvers we test, test modes, or the edge-testing feature — at any time, for any reason, without notice.

Results are estimates, not guarantees

Every number the test shows you — median latency, jitter, reliability, or a resolver ranking — is a measurement taken at that moment, from your device, over your current network. It's an honest estimate meant to help you make an informed choice, not a guarantee of the speed, uptime, or behavior you will experience from any DNS resolver going forward. Network conditions change from minute to minute, and the same test run five minutes later can produce different numbers. See our methodology page for exactly how measurements are taken and what can cause variance.

A faster resolver can shorten the brief delay before a page starts loading. It does not increase your download or upload bandwidth, and it can't fix a website that's slow for other reasons. Use the results as one input among several when choosing a DNS resolver — not as a certified benchmark.

Acceptable use

You're welcome to use the site for personal or professional research into DNS resolver performance. Please don't:

• Automate, script, or programmatically hammer the test or its underlying API outside normal interactive use. The live-test endpoints are rate-limited specifically to keep the service usable for everyone; requests that exceed reasonable, human-driven use may be throttled or blocked without warning.
• Attempt to probe, disrupt, or overload the site's infrastructure, the edge-testing worker, or any third-party resolver through the site.
• Scrape or republish the site's content or data at scale without permission.
• Use the site to test or target infrastructure you don't have permission to test.
• Attempt to circumvent rate limits, access controls, or other technical protections on the site.

We reserve the right to restrict access for anyone who abuses the service, and to change rate limits or usage rules as needed to keep the tool reliable for everyone.

Limitation of liability

To the fullest extent permitted by law, TestsDns and its operators are not liable for any indirect, incidental, consequential, or special damages arising from your use of, or inability to use, the site — including any decision you make about which DNS resolver to use based on results shown here. The site is a free, informational tool; use it at your own discretion and verify anything mission-critical through your own testing.

Third-party resolvers and trademarks

TestsDns measures and compares publicly available DNS resolvers, including services operated by Cloudflare, Google, Quad9, OpenDNS (Cisco), and AdGuard, among others. The names, logos, and trademarks of these resolvers belong to their respective owners. Mentioning or measuring a resolver here does not imply that its operator endorses, sponsors, or is affiliated with TestsDns in any way — this site is an independent, unaffiliated project. For a resolver's own terms, privacy practices, or support, see that provider's own site (linked from our public DNS servers guide and individual provider pages such as Cloudflare DNS, Google DNS, Quad9, OpenDNS, and AdGuard DNS).

Your data

We collect very little, and none of it is required to use the core test. Full details — including what the optional edge test stores and how long anything is kept — are in our privacy policy.

Changes to these terms

We may update these terms from time to time, for example to reflect a new feature, a changed rate limit, or a legal requirement. When we do, we'll update the date below. Continuing to use the site after a change means you accept the revised terms. If a change is significant, we'll aim to make it obvious on the site itself.

Contact

Questions about these terms? Email [email protected] or use the contact page.