DNS Speed Test
Benchmark DNS-over-HTTPS servers from your browser and compare their response times with DNS Speed Test.
About DNS Speed Test
DNS Speed Test is a browser-based tool that measures DNS-over-HTTPS (DoH) response times from the user's own location. It benchmarks a set of DoH servers against a list of hostnames, reporting minimum, median, average and maximum round-trip times in milliseconds so results can be compared across servers.
The test runs entirely in the browser using fetch and performance.now(), with a warm-up phase to reduce TCP/TLS handshake overhead. Queries time out after 5 seconds and unresponsive servers are marked Unavailable with a 5000ms penalty. Results vary with network latency, bandwidth and browser load, so the site recommends several runs at different times and treats the numbers as a relative comparison. The site states that no server-side code is involved and no personal data is collected.
Key features
- Benchmarks DoH servers with min, median, average and maximum timings
- Runs measurements entirely in the browser, no installation required
- Warm-up phase primes connections and caches before timing
- Per-hostname timings shown for a selected DNS server
- Custom hostnames can be added to the benchmark list
- Custom DoH servers can be added; CORS and method support auto-detected
Best for: Developers and technical users who want to compare DNS-over-HTTPS server response times from their own location.
Good for
- Measures real DoH round-trip times from the user's local environment
- Warm-up phase reduces TCP/TLS handshake overhead for fairer comparison
- Benchmark host and server lists can be exported and imported as JSON
Watch out for
- Results vary with network latency, bandwidth and browser load, so multiple runs are needed
- Timings include HTTP/TLS overhead and may be higher than raw DNS query tools
- Only DNS-over-HTTPS servers are tested
DNS Speed Test at a glance
- Website
- dnsspeedtest.online
- Category
- Development › Developer Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
DNS Speed Test alternatives
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DNS Speed Test FAQ
How are the timings measured?
The tool uses fetch and performance.now() to measure full DNS-over-HTTPS round-trip times, which include HTTP/TLS overhead.
What happens when a DNS server does not respond?
Each query times out after 5 seconds, and unresponsive servers appear as Unavailable with a 5000ms penalty applied.
Can I add my own servers and hostnames?
Yes. Custom DNS-over-HTTPS servers and hostnames can be added, and both lists can be saved as JSON or imported, up to a 1 MB import size.
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