SiteAnalyzer

It is an open-source, automated tool for measuring the quality of web pages. It can be run against any web page, public or requiring authentication. It has audits for performance, accessibility and search engine optimization of web pages. It also includes the ability to test progressive web applications for compliance with standards and best practices.

Analyze your website speed and performance based on performance best practices and timing metrics. You can run it using Docker, test your site in Chrome and Firefox and graph the metrics in Grafana.

It is an all-in-one performance optimization service. It helps ecommerce, content publishers and web agencies achieve outstanding website speed optimization results.

Free test tools to check whether specific components of your website or server are operating properly, and to find out what your end-users are experiencing at any given time.

Compare the display of your web design no matter the operating system, browser, and its version. Check your site for any visual bugs. Make complicated web testing easy.