This tool gives you
This free website speed test checks response time and estimated TTFB for any URL, with a fast-or-slow verdict graded against Google's thresholds. No signup, no benchmark history.
Postman Monitors gives you
Postman Monitors turns that single check into response-time trends over time, so you can tie a regression to the deploy that caused it,
continuous scheduled monitoring with alerts when response time crosses a threshold you set, multi-region measurement from Postman's global regions, and a Postman CLI check that fails your build on a regression.
Why might this number differ from what I see in my own browser?
Enter a URL and Postman issues one request from a server and times the round trip. It reports total response time and an estimated time to first byte. Because the measurement comes from a Postman server rather than your own machine, it is a consistent synthetic figure — useful for comparisons and trends, not the exact latency a visitor on a particular network would see. One check is a single sample.
Why did my score change when I didn't touch anything?
Response time and TTFB fluctuate with network conditions, server load, and CDN caching — a small swing between checks is normal, not a regression.
Is my TTFB or speed score actually good or bad?
The verdict is graded against Google's published TTFB thresholds, giving you a quick benchmark for server response.
What is TTFB and why does it matter for site speed?
Time to first byte measures how long the server takes to start responding — it isolates backend and network delay from rendering time.
Can I track my website's performance over time, not just check it once?
Yes —
Postman Monitors runs this same check on a schedule and keeps a history of response time so you can catch regressions early.
Can I fail my CI build if my site's response time regresses?
The Postman CLI can run this check in your pipeline and fail the build when response time crosses a threshold you set.
Is there a quick website health check I can run before a launch?
This speed test plus the uptime and API health checkers cover a fast pre-launch pass without any setup.
Can I check API response time too, not just websites?
Yes — this tool measures response time and TTFB for any URL, including an API endpoint, not just a webpage. This is actually where Postman's monitoring goes further: Postman Monitors can assert on the real response body of an API — not just confirm it responded fast — across every endpoint you care about.