DNS Speed Test Benchmark - Find the Fastest DNS Server for Your Location

Disclaimer

This DNS Speed Test tool runs entirely in your browser, sending live DNS-over-HTTPS (DoH) queries from your local environment. No server-side code is involved, and no personal data is collected. By measuring directly from your current network, the tool aims to provide accurate, real-world results.

Warm-Up Phase: Before timing each DNS server, the script primes connections and caches to minimize the overhead of TCP/TLS handshakes. This warm-up step helps ensure consistent, ready-to-go conditions when actual measurements begin. While it adds a small initial delay, it more fairly represents typical DoH performance once connections are established.

Time Measurement & Browser Overhead: We use the browser’s fetch and performance.now() APIs to measure full DoH round-trip times. Because this includes HTTP/TLS overhead, results may be higher than raw DNS queries performed by other tools. Depending on server capabilities, our script may use GET or POST, CORS or no-cors mode. Some endpoints require a preflight request, which can slightly affect timings.

Timeouts & Unavailable Results: Each query times out after 5 seconds. If a server does not respond in that window, it appears as Unavailable. This ensures the test continues promptly even when certain DNS endpoints are slow or unreachable.

Influence of Local Conditions: Network latency, bandwidth, and browser load can cause variability. We recommend running multiple tests at different times or under different network conditions to get a broader picture. The tool’s output is best used as a relative comparison among DNS servers under your specific circumstances rather than an absolute global measure.

While we strive for accuracy by testing each DNS server with the same set of hostnames (and reusing warm connections), results are still indicative. Use them as a guide when deciding which DNS server offers the best performance for your location and environment.