TTFB Checker
Measure the time to first byte of a URL and see if servers, redirects, or connection are slowing down the start of the page.
Technical pre-testing without browser rendering. Own scores of 0–100 mean: higher = less recognized risk signals. No measured LCP, INP or CLS values. TTFB is measured on the server side.
Ideal for slow server responses, CDN checks, relaunch QA and initial LCP causes.
Results
Technical pre-checking of a URL. For a crawl over many URLs, use the premium audit.
Findings
Detailed hit
Practical example · for illustration
Slow First Response After a Redirect
Example: The call starts at HTTP, switches to HTTPS and only then reaches the preferred host. Check the redirect chain before you make the hosting solely responsible. If possible, direct directly to the final URL and compare the same address several times with warm and cold cache.
What does not prove the result
The TTFB comes from a server retrieval. Location, DNS, TLS, cache and network change the time; it does not correspond to the full load time in the browser.
Deepen with PageSpeed Insights and available field data · Google's Definition of Core Web Vitals
What the TTFB Checker evaluated
The pre-check evaluates the retrieved HTML and a limited sample of linked resources. It does not execute JavaScript and does not simulate user interactions. Findings are concrete occasions for an examination in the browser; an inconspicuous result does not exclude performance problems.
From a single check to Core Web Vitals Audit
The audit examines multiple URLs and helps to find recurring technical patterns in templates. This way you can see if a change affects several pages and where you can start the implementation.
Questions about TTFB Checker
Which TTFB is good?
As a rough technical orientation, values below 800 ms are often considered solid. Very high values should be checked on the server side, by cache or CDN.
Does the TTFB Checker measure real user data?
No. The tool measures on the server side from the Seitenreport system. For real user data, Search Console, CrUX or RUM should be added.
Why are there standalone tools in addition to the audit?
Individual tools help with a specific URL or technical problem. The audit compares these signals across multiple URLs and shows recurring patterns.
Is the individual check free of charge?
Yes. The standalone tools check a single URL. For larger crawls, complete tables and CSV export, the premium audit is planned.