Performance
Free TTFB Checker
Time to First Byte (TTFB) is how long the server takes to start responding. Check this page's TTFB when available.
Focus: TTFB
Guide
What is TTFB?
TTFB measures delay before the browser receives the first byte of the HTML document. It often reflects hosting, caching, and backend work.
Why it matters
A slow server delays everything else — images and scripts cannot start loading until the document arrives.
Common problems
- Slow hosting or backend processing
- Missing page caching
- Heavy database queries
- Distant server location
How to fix them
Aim for TTFB under 800ms: enable page caching, review slow queries, and check CDN/hosting response times.
Example
Example: TTFB 1.5s → server work is the first bottleneck before any image loads.
FAQ
What is a good TTFB?
Under 800ms is typically considered good for the initial document.
Is TTFB the same as full page load?
No — it is only the wait until the server starts sending the HTML.
Is it free?
Yes.