Free tool · HTTP
Measure how long an HTTP request takes. Enter an address to see how long the server takes to start answering.
How long the request took from start to the first answer. Under half a second is good for a page; an API should be faster.
Response time varies from request to request. Run the check a few times and look at the range, not one number.
Slow answers can come from the name lookup, the connection setup or the server itself. Compare with a fast site to see how much is outside your control.
The distance between the measuring server and your site, and the load at that moment, change the number. For comparing, always measure from the same place.
For a regular page, under 500 milliseconds to the first answer is good and over two seconds is slow. Users notice delays well before they become errors.
No. It measures the answer of the address you entered, not the full page with everything it loads.
UptimeWire runs these checks for you around the clock and alerts you when something changes. Start with the free plan, no card needed.
