Learning platform for developers

W3Schools is a free educational platform for web technology instruction. HTML, CSS, JavaScript, JSON, PHP, Python, AngularJS, React.js, SQL, Bootstrap, Sass, Node.js, jQuery, XQuery, AJAX, XML, Raspberry Pi, C++, C#, and Java tutorials and references are included throughout the material.

Created in 1998, but not aligned with the W3C (World Wide Web Consortium), the name is taken from the World Wide Web.

It is being run in Norway by Refsnes Data. For consumers to learn from, W3Schools offers thousands of programming samples.

Anyone can edit samples and execute machine code experimentally by using their online code editor, Check it yourself, and see what works and what doesn't work before applying it.