HTML5 Please is described as 'Look up HTML5, CSS3, etc features, know if they are ready for use, and if so find out how you should use them – with polyfills, fallbacks or as they are' and is an website in the development category. There are four alternatives to HTML5 Please, not only websites but also apps for Visual Studio Code. The best HTML5 Please alternative is Can I use, which is both free and Open Source. Other great sites and apps similar to HTML5 Please are Can I email, VScode CSS Compatibility and QuirksMode.org Compatibility Tables.
Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.
Can I use is the most popular Web-based alternative to HTML5 Please.
Can I use is the most popular Open Source & free alternative to HTML5 Please.
A VS Code extension to check, on hover, which CSS syntax, keywords, types, or functions are compatible or supported with all browsers and their versions.
My Compatibility Tables are by far the most popular resource on this site. Here you find the master table that contains links to the individual tables.
United States
Germany
EU