Lighthouse Report Formatter

Paste raw Lighthouse JSON export data to extract structured performance metrics, scores, and clean Markdown summaries.

Raw Lighthouse JSON:

Formatted Summary (Markdown):

Paste a valid Lighthouse JSON report and click Format to generate the performance summary.

Core Web Vitals Thresholds Reference

1. LCP (Largest Contentful Paint)

Measures loading performance. Good threshold is ≤ 2.5s.

2. INP (Interaction to Next Paint)

Measures interactivity responsiveness. Good threshold is ≤ 200ms.

3. CLS (Cumulative Layout Shift)

Measures visual stability. Good threshold is ≤ 0.1.

What is Lighthouse Report Formatter?

Lighthouse Report Formatter is a browser-based utility for web performance and delivery analysis. It helps you transform, inspect, generate, or evaluate the relevant input without installing a separate desktop tool.

How to use this tool

Enter or paste the required input, select the available options, then review the generated result before copying or applying it in your project. Check the output in its real target environment when accuracy matters.

Frequently Asked Questions (FAQ)

Yes. This tool is designed to process the values you enter in your browser.

Review the output for the target syntax and test it in the application, browser, API, or workflow where it will be used.