Test DNS resolution speed and performance by measuring lookup times for different domains. Check DNS response times, verify DNS functionality, and troubleshoot network connectivity issues. Useful for network diagnostics and performance optimization.
DNS (Domain Name System) translates human-readable domain names like "google.com" into IP addresses like "142.250.191.14". DNS lookups typically take 20-100ms, but can be cached to reduce this to under 1ms. Fast DNS servers can significantly improve web browsing speed, with some DNS providers offering response times under 10ms.
Start with the live tester below. Supporting details, FAQs, and troubleshooting guidance are placed after the tool so the main action is easier to find and use immediately.
Test DNS lookup speed and resolution performance.
Common problems
If the live tester does not behave as expected, these are the first checks most users should try before assuming the hardware is broken.
Test DNS lookup speed for different domains
Check DNS response times
Compare with different DNS servers
Test DNS caching effectiveness
Test DNS resolution speed and performance by measuring lookup times for different domains. Check DNS response times, verify DNS functionality, and troubleshoot network connectivity issues. Useful for network diagnostics and performance optimization.
DNS (Domain Name System) translates human-readable domain names like "google.com" into IP addresses like "142.250.191.14". DNS lookups typically take 20-100ms, but can be cached to reduce this to under 1ms. Fast DNS servers can significantly improve web browsing speed, with some DNS providers offering response times under 10ms.
Test your keyboard input, detect dead keys, and verify all keys are working correctly.
Test mouse buttons, scroll wheel, pointer tracking, and touch input.
Test your microphone input levels in real-time. Verify microphone is working.
Test your speakers or headphones with reference tones.
Helpful questions
Use these answers to understand results, browser limitations, permissions, and sensible next troubleshooting steps.
A fast connection does not guarantee fast DNS lookups. Before the browser can load a site, it must resolve the domain name first. If DNS is slow, inconsistent, or failing intermittently, pages can still feel sluggish even when bandwidth and ping look acceptable.
Caching stores a recent domain lookup so the next request can often be answered much faster. That is why the first lookup may be noticeably slower than later attempts. Comparing cold and repeated lookups helps you understand whether slow performance comes from the resolver itself or only from the uncached first request.
Compare them when a domain loads quickly on mobile data but slowly on Wi-Fi, or when some sites fail only on one network. That pattern often points to an ISP DNS issue, a local router problem, or a resolver configuration problem rather than a general internet outage.