Measure HTTP request round-trip time from your browser to this site's server. Results are not ICMP ping measurements and do not measure download speed.
Measures browser-to-server HTTP request round-trip time with 10 fetch() requests and performance.now().
cache: 'no-store' and measures elapsed time using performance.now(). Browser work and server response time affect results. Connection setup overhead may appear when a new connection is required.Network latency is the time it takes for data to travel from your browser to a server and back — the round-trip time (RTT). It is measured in milliseconds (ms) and is one of the most important factors for the responsiveness of online services, especially real-time applications like gaming, video calls, and live trading.
Unlike download speed (bandwidth), which determines how fast large files transfer, latency determines how quickly a connection responds. You can have a fast internet connection with poor latency if the server is geographically distant or if your ISP routes traffic inefficiently.
Ideal for competitive gaming and low-latency applications. Typical of fast wired connections to nearby servers.
Suitable for most online gaming and real-time applications. Most broadband connections fall here.
Acceptable for casual gaming and streaming. May cause perceptible delay in competitive scenarios.
Noticeable lag in real-time applications. Consider checking your ISP, router, or VPN configuration.
More free tools to check your setup.
Benchmark your browser JavaScript engine with Math, DOM, String, and Array workloads.
Measure browser-level click-to-frame latency using requestAnimationFrame. See average, best, and worst lag across 10 clicks.
Measure browser animation-frame timing over 10 seconds using requestAnimationFrame. See average, min, and max FPS with a live bar chart.
Measure your reflex speed in milliseconds with a 5-round click test. Compare to gamer and average population benchmarks.
Benchmark browser JavaScript CPU speed with integer math, float math, prime sieve, Fibonacci, and JSON parsing.
Learn how to optimize your connection and reduce latency.
If an online keyboard tester does not detect one key, several keys, or modifier combinations, start with focus, layout, browser shortcuts, rollover limits, and hardware checks.
A browser GPU stress test can reveal crashes, throttling, noisy fans, and WebGL issues, but it cannot replace tools that read sensors, VRAM errors, or driver-level stability.
If a refresh rate test reports 60Hz on a 144Hz or 240Hz monitor, check OS settings, cable limits, browser throttling, VRR, duplicated displays, and power mode.
Mouse polling rate tests can jump between values because of movement speed, DPI, browser event delivery, wireless mode, CPU load, and USB power settings.
If a browser gamepad tester does not detect an Xbox, PlayStation, Switch, or generic controller, check connection mode, browser support, focus, permissions, and Steam input.
If an online microphone test cannot hear you, check browser permissions, the selected input device, OS privacy settings, exclusive mode, Bluetooth headset profiles, and HTTPS.