Español
Deutsch
Render-blocking resources are CSS or JavaScript files that a browser must fully download and process before it can display anything on the page.
Why This Slows Perceived Speed
Even if the rest of your page's content is ready, a large render-blocking file forces visitors to stare at a blank screen until it finishes loading.
Common Fixes
Loading non-critical CSS asynchronously, deferring JavaScript that isn't needed immediately, and inlining small amounts of critical CSS directly in the page's head all reduce this delay.
Where to Start
Performance testing tools like Lighthouse specifically flag render-blocking resources, giving you a concrete list to address rather than guessing which files matter most.
