100% Free Online Performance Tool

Free PageSpeed & Core Web Vitals Analyzer

Measure LCP, FID, CLS, and page speed diagnostics for your store with our free audit utility.

How to Use Instructions:

  1. Paste your complete page URL (e.g., https://yourstore.com/product).
  2. Choose whether to analyze Mobile or Desktop viewport performance.
  3. Click Analyze Free PageSpeed to generate performance score & Core Web Vitals breakdown.

Free Performance Score /100

Largest Contentful Paint (LCP)
Cumulative Layout Shift (CLS)
Total Blocking Time (TBT)

Continue with related JunctionTools utilities: Image Compressor & Resizer · CSS/JS Minifier · Mobile UX Checker.

About This Tool

Measure common web performance indicators such as loading behavior and Core Web Vitals-related signals. Use the results to identify pages that may need image, script, layout or server-delivery optimization.

How to Use It

Enter a complete page URL, choose the target device profile and run the analysis. Review the score and individual metrics instead of relying on one overall number.

How It Works

Performance is affected by network conditions, device capability, server response, render-blocking resources, images, JavaScript and layout work. A single test is a snapshot rather than a permanent score.

Practical Example

A page with large hero images and blocking scripts may show slower loading metrics. Compressing appropriate assets and reducing unnecessary main-thread work can improve the experience.

Frequently Asked Questions

Does the result guarantee a particular outcome? No. It is a practical indicator that should be interpreted with the actual context.

Should important findings be verified? Yes. Use additional testing or expert review where the decision is consequential.