Google Lighthouse is an open-source, automated tool for improving the quality of web pages. It has audits for performance, accessibility, progressive web apps, SEO, and more. It runs a series of audits against a page and then generates a report on how well the page did and suggests improvements. The tool can be run from the command line, in Chrome DevTools, or from a web page, and can generate output in the form of HTML, CSV, and JSON. It can be used to improve the performance of web pages, to ensure that they are accessible to all users, and to help make sure that they are optimized for search engine rankings.
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Violinist intercepts traffic and allows you to debug, Lighthouse performs an audit.