Lighthouse

noun

Lighthouse is an open-source tool from Google that automatically audits web pages for performance, accessibility, best practices, SEO and more.

We use Lighthouse to identify ways to improve a web page.

Lighthouse audits a web page and creates a report. You can run it in Chrome DevTools, from the command line or as a Node module. The Chrome for Developers documentation explains how to start an audit and read its results.

An audit shows which checks need attention and links to an explanation of why each check matters and how to address it. The report helps you find improvements; it describes an audit of a page, not an automatic assessment of an entire website.