Render-Blocking Resource Analyzer
Find scripts + CSS blocking first paint
📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
Render-blocking analyzer
How to use this tool
- 1
Paste HTML head
- 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.
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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.