Performance Documentation
Learn how response time, document size, compression, and network conditions affect a website experience.
Related tools
Website Speed Test
Test how fast a website loads: time to first byte, DNS, connection, TLS, download time, page size, compression, and render-blocking resources.
Website Score
Measure a public website's SEO, performance, accessibility, security, and technical health.
Internet Speed Test
Measure browser download speed, upload speed, and latency using a lightweight local test.
Ping
Measure the latency between your browser and a public endpoint using browser-friendly timing.
Is My Website Down?
Test if a site is reachable and quickly review the response status and timing.