Free Render-Blocking Checker — Find Scripts and Styles Blocking Paint
Identify every render-blocking JavaScript and CSS resource that is delaying your page's First Contentful Paint and Largest Contentful Paint.
Free — no account required for a single check. Sign up for continuous monitoring →
What the Render-Blocking Resources Checker checks
Render-blocking scripts identified
Render-blocking stylesheets identified
Blocking time per resource
Potential FCP improvement
Async/defer opportunities
Critical CSS inlining candidates
How it works
Analyses the resource loading waterfall during page render to identify synchronous scripts and stylesheets in the critical rendering path.
Monitor continuously — not just once
This free tool runs a one-off check. AuditJet monitors your site on a schedule — alerting you when scores change, before performance regressions affect your rankings and revenue.
Render-Blocking Resources Checker — FAQ
Is the Render-Blocking Resources Checker free?
Yes — Render-Blocking Resources Checker is completely free to use. No account required for a single-URL check.
How does the Render-Blocking Resources Checker work?
Analyses the resource loading waterfall during page render to identify synchronous scripts and stylesheets in the critical rendering path.
What does the Render-Blocking Resources Checker check?
Render-blocking scripts identified. Render-blocking stylesheets identified. Blocking time per resource. Potential FCP improvement. Async/defer opportunities. Critical CSS inlining candidates.
How is this different from Google PageSpeed Insights?
Google PageSpeed Insights is a one-off manual tool. AuditJet adds continuous monitoring, regression alerting, and revenue impact on top of the same performance analysis — so you're notified when scores change, not just when you remember to check.