How fast the main thing shows up
LCP measures the main image or heading. Good is 2.5 seconds or less. Check image delivery, server response and render blocking.
[ Tool K02 ]
Core Web Vitals checker
No email. A result or clear error within 25 seconds. Shareable for 30 days.
Your report starts here
Enter a public web page URL. We separate field data from lab measurements, explain missing data, and suggest the next fixes.
Three numbers, one pass/fail, fixes in order.
How quickly the page reacts when tapped
INP measures responsiveness across real interactions. Good is 200 milliseconds or less. A navigation-only lab run cannot measure field INP.
How much the page jumps around
CLS measures unexpected movement. Good is 0.1 or less. Reserve space for images, embeds and fonts.
What this tool does and does not do.
Field data
Chrome UX Report, rolling 28-day p75, mobile and desktop separately. Low-traffic pages may have no field data.
Lab data
PageSpeed Insights mobile lab when available. Local verification may use Chromium on the current network; the report states the exact method.
Fix suggestions
Rule-based priorities, not guaranteed gains. Confirm each suggestion with a developer and repeat comparable measurements.
Platform detection
Markup hints identify WordPress, WooCommerce and Shopify. Other sites receive generic advice.
Privacy
URLs and reports are retained for share links for up to 30 days. Do not submit private URLs or URLs containing access tokens. No email is required.
Rate limits
Ten checks per IP per hour. Cached reports can be reused for 24 hours.
Scope a speed sprint around the evidence.
Fixed scope on your existing WordPress, WooCommerce or Shopify site. Investigate the causes, agree on a budget, and compare before and after under the same conditions.
Scope a speed sprintAlso free, also no email.
Project scoper
Review a scope tier, timeline and assumptions before asking for a proposal.
Define the scope