LCP and TBT performance analyzer

Find what is slowing visible load and main-thread work

Analyze Largest Contentful Paint and Total Blocking Time with resource, image, CSS, font, JavaScript, main-thread, and rendering pipeline diagnostics.

LCP element

Find the largest visible element and what delays it

Resource loading

Waterfall, render blockers, cache, CDN and preload opportunities

TBT blockers

Long tasks, JS execution, hydration, parsing and third-party scripts

PDF reports

Export and track Firebase history over time

Your LCP & TBT report will appear here

The analyzer focuses only on visible load speed and main-thread blocking work, with practical fixes for developers and agencies.

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