Website Speed Test
Measure the connection timeline — DNS, TCP, TLS and Time To First Byte — plus HTML size, compression, caching and CDN, with fixes for what’s slow.
Why TTFB matters
Time To First Byte gates every other metric — nothing renders until the first byte arrives. It’s the sum of DNS, TCP, TLS and your server’s processing time. The biggest wins are usually edge caching (a CDN) and faster server/database work.
Compression & caching
Serve text assets with Brotli or gzip, and set sensible Cache-Control so repeat visits are instant. Both are one-line CDN settings on most hosts.
Related
Frequently asked questions
▸ ▾ What does the speed test measure?
The connection timeline — DNS, TCP, TLS and Time To First Byte — plus HTML size, compression, cache-control and CDN detection.
▸ ▾ How is this different from Core Web Vitals?
This is server-side timing from our location. Core Web Vitals (LCP/INP/CLS) are field metrics measured in a real browser — use the Core Web Vitals Checker for those.