More performance tools
Page speed checkerPage speed score, load timings, page weight and what slows the page down.
Page size checkerHow big is the page's HTML?
DOM size checkerCount DOM elements, depth and the widest node.
HTTP requests checkerHow many files a page loads, by type.
Lazy loading images checkerAre images below the top lazy-loaded?
JavaScript defer checkerFind render-blocking scripts.
Inline CSS checkerCount <style> blocks and style attributes.
Image format checkerWhich images could move to WebP or AVIF.
How to use the ttfb checker
Time to first byte, DNS, connect and TLS timings. Enter the page address above and press the button. Results appear on this page and you can share the link.
Visitors can run 30 checks a day. Create a free account for projects, site audits, rank tracking and saved keyword lists.