⚡ Site Speed Test for youtube.com

Free, instant results. No signup. No API keys.

TTFB (Time to First Byte) 348 ms

Total Response Time 468 ms

DNS Lookup 16 ms

TCP Connection 16 ms

Download Size 837.7 KB

HTTP Status 200

TTFB under 500ms is excellent. 500-1000ms is acceptable. Over 1000ms indicates slow server-side processing.

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What is Site Speed Test?

TTFB (Time To First Byte) measures how long it takes for a server to start sending the first byte of a response after a request is made. It's one of the most important metrics for site speed, reflecting server processing time, database queries, and backend performance. Our tool measures TTFB, total response time, and download size, giving you a clear picture of a site's server-side performance.