Free TTFB Checker — Test Time to First Byte
Measure your Time to First Byte from multiple global locations and identify server response bottlenecks affecting your Core Web Vitals.
Free — no account required for a single check. Sign up for continuous monitoring →
What the TTFB Checker checks
TTFB in milliseconds
Server response time breakdown
DNS lookup time
TCP connection time
SSL negotiation time
Server processing time
How it works
Sends HTTP requests to your URL from multiple test locations and measures each phase of the connection lifecycle to identify where TTFB delays originate.
Monitor continuously — not just once
This free tool runs a one-off check. AuditJet monitors your site on a schedule — alerting you when scores change, before performance regressions affect your rankings and revenue.
TTFB Checker — FAQ
Is the TTFB Checker free?
Yes — TTFB Checker is completely free to use. No account required for a single-URL check.
How does the TTFB Checker work?
Sends HTTP requests to your URL from multiple test locations and measures each phase of the connection lifecycle to identify where TTFB delays originate.
What does the TTFB Checker check?
TTFB in milliseconds. Server response time breakdown. DNS lookup time. TCP connection time. SSL negotiation time. Server processing time.
How is this different from Google PageSpeed Insights?
Google PageSpeed Insights is a one-off manual tool. AuditJet adds continuous monitoring, regression alerting, and revenue impact on top of the same performance analysis — so you're notified when scores change, not just when you remember to check.