Time the major public DNS resolvers — Cloudflare, Google, Quad9, OpenDNS, AdGuard, Mullvad — from your connection, and see which responds fastest. Honest about what it measures. Nothing stored.
See how quickly the major public DNS resolvers respond from your connection. We time a real DNS-over-HTTPS lookup against each one, several times, and show the median. Runs in your browser; nothing is stored.
This times how long each provider’s DNS-over-HTTPS (DoH) endpoint takes to answer a lookup from your browser, which is the only kind of DNS query a browser can make. It’s a fair, like-for-like comparison of the public resolvers — but it’s a close proxy for classic DNS speed, not the exact figure you’d get after changing your router’s settings. Treat it as “which resolver is quickest to reach from here,” not a guarantee of a specific page-load improvement.
A browser can’t directly time your ISP’s resolver — it doesn’t expose a DoH endpoint we can query cross-origin. So rather than show you a made-up number, we leave it out. If you want to compare against your ISP, the honest way is a command-line tool (nslookup or dig) run on your own machine.
A little, sometimes. DNS lookup happens once per new domain and is usually a small slice of total load time, so a quicker resolver shaves milliseconds off first connections — noticeable when browsing lots of new sites, less so for things already cached. The bigger reasons people switch are reliability, privacy (some resolvers log less), and features like malware or ad filtering (Quad9, AdGuard). Speed is one factor among several, not a magic fix.
You can set a resolver on a single device or, better, once on your router so everything benefits. Use the resolver’s two addresses (for example Cloudflare 1.1.1.1 and 1.0.0.1; Google 8.8.8.8 and 8.8.4.4).
Router (best): admin page → Internet/WAN or DHCP settings → set DNS
Windows: Settings → Network → adapter → Edit DNS → Manual
macOS: System Settings → Network → Details → DNS
iPhone: Settings → Wi-Fi → (i) → Configure DNS → Manual
Android: Settings → Network → Private DNS (DoH/DoT hostname)
To reach your router’s admin page, see how to find your router’s IP and log in.
Related: Connection latency test · DNS & WebRTC leak testing