description Google Lighthouse Overview
Google Lighthouse is a free, open-source web auditing tool developed by Google. It analyzes websites to assess their performance, accessibility, and adherence to web standards. Primarily used by web developers and designers, Lighthouse provides actionable insights for improving website speed, usability, and overall quality. Its Chrome extension facilitates real-time audits directly within the browser.
help Google Lighthouse FAQ
How do I run Google Lighthouse on my website?
You can run Lighthouse directly inside Google Chrome by opening DevTools (right-click and Inspect), selecting the Lighthouse tab, and clicking 'Generate report.' It is also available as a command-line tool installable via npm, and can be integrated into CI/CD pipelines using Lighthouse CI.
What categories does Google Lighthouse score?
Lighthouse evaluates webpages across five categories: Performance, Accessibility, Best Practices, SEO, and Progressive Web App. Each category produces a score from 0 to 100, with the Performance score calculated from metrics like Largest Contentful Paint, Cumulative Layout Shift, and Total Blocking Time.
Is Google Lighthouse free and open-source?
Yes, Google Lighthouse is completely free and open-source, hosted on GitHub under the Apache 2.0 license. It is also built directly into Google Chrome DevTools and powers the web-based PageSpeed Insights tool.
What is considered a good Lighthouse performance score?
Google defines a Lighthouse Performance score of 90 or above as good, 50 to 89 as 'needs improvement,' and below 50 as poor. These thresholds align with Google's Core Web Vitals requirements, which influence search ranking signals.
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