A collection of free single-purpose online tools for web developers...
Brought to you by Stefan Judis
(Website, Twitter, GitHub)
and 137 lovely people:
Visualize the cumulative layout shifts of any webpage to identify improvements.
Run lighthouse from multiple locations
Test a website in more than 80 web-based analysis tools
Get the web's modern capabilities on your own sites and apps with useful guidance and analysis from web.dev
Analyze your website to get hints about Accessibility, Compatibility, PWA, Performance, Pitfalls and Security