About TestsDns
A fast, honest, privacy-first way to see which DNS resolver actually serves your connection best — built in the open, with nothing to sell you.
What is TestsDns?
TestsDns (testsdns.com) is a free browser-based tool that measures how quickly popular public DNS resolvers answer lookups from your own connection, so you can pick the fastest and most reliable one for you — without guessing or relying on someone else's benchmark.
Why we built this
Most "best DNS server" lists online repeat the same recycled rankings, often years out of date, often written by someone who never ran a single test. DNS performance depends on where you are, which resolver's nearest data center you land on, and what your network looks like at that moment — a ranking measured from a data center in another country tells you very little about your own connection. We built TestsDns so anyone could get a real answer, measured from their own browser, in under a minute, using the free DNS speed test.
The goal is narrow on purpose: measure DNS resolver latency honestly, explain what that latency does and doesn't mean, and get out of the way. We are not trying to sell a VPN, a router, or a "premium" resolver — there's nothing to upsell.
Our commitment to honesty
We don't publish fabricated benchmarks, star ratings, or review counts. Every latency number you see on this site either comes from a test you just ran in your own browser, or is explicitly labeled as coming from our edge network rather than your device. We don't claim a resolver is "the fastest in the world" — speed depends entirely on where you're testing from, and we say so plainly wherever it matters.
We're equally upfront about what the tool can't do. A browser cannot open the raw UDP sockets that a native DNS benchmarking tool uses, so our test measures DNS-over-HTTPS latency instead — a close, honest proxy for real-world DNS speed, not an exact substitute. The full breakdown of warm-up requests, randomized lookups, statistics, and known sources of noise is published on the methodology page, and we'd rather you read the limitations than trust a black box.
How it's built
TestsDns is an Astro site deployed on Cloudflare's network, which keeps pages fast to load and lets the optional edge comparison run close to each resolver being measured. The browser-based speed test is plain client-side JavaScript with no dependency on any resolver's own tooling — we time the same kind of request against every provider, the same way, so the comparison stays fair.
Nothing about the methodology is hidden. If you want to know exactly what a "median" or "jitter" figure means, how many lookups make up a test run, or why a resolver might occasionally show as unreachable, it's all documented on the methodology page — the same page we'd want to read before trusting a speed test ourselves.
Privacy first, by design
The browser speed test runs entirely on your device. We don't log the domains you look up, store your full IP address, or build a profile of your browsing. Results live in your browser unless you choose to export them. Any aggregated, non-identifying counters we do keep — and exactly why — are spelled out in full on the privacy policy. If a future feature ever needed to collect more, we'd say so there first.
Who this is for
Anyone who wants a straight answer about which DNS resolver to use — people troubleshooting a slow browsing experience, gamers comparing latency and jitter for DNS for gaming, privacy-conscious users weighing options on the DNS for privacy guide, or anyone deciding between Cloudflare and Google DNS. Once you've picked a resolver, the setup guides walk through changing DNS on Windows, macOS, Android, iPhone, Linux, and most routers.
Get in touch
Found something inaccurate, confusing, or broken? We'd genuinely like to know — reach out through the contact page. Corrections to methodology or provider details are especially welcome; accuracy is the entire point of this site.