At its I/O 2025 developer conference, Google launched Stitch, an AI-powered tool to help design web and mobile app frontends by generating the necessary UI elements and code.

The demos are on the Apple Developer site ... By taking several product snapshots and then assembling them with HTML, CSS, and JavaScript, you can easily create the kinds of rich interactions ...

It allows you to edit PHP, HTML, CSS and JavaScript files ... recognition and building of the complete structure of PHP projects—all of these functions ensure easy work with projects of any scale.

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code ... to create scrap projects or files.