🚧

Render-Blocking Resource Analyzer

Find scripts + CSS blocking first paint

📚
Learn more — how it works, FAQ & guide
Click to expand

Render-blocking analyzer

How to use this tool

  1. 1

    Paste HTML head

  2. 2

    See blocking resources

Frequently Asked Questions

Render-blocking?
Scripts without async/defer and CSS without media attr block the critical rendering path. Directly hurts LCP.

You might also like

🔒
100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.