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 right inside your browser. A quick tour ...

Online code-editor is a tool that resides on a remote server and is accessible via browsers. online code editor for HTML, CSS and JS code snippets using HTML, CSS and JQuery.

This is a simple web-based Quiz Application that includes user login functionality. The application is built using HTML, CSS, and JavaScript. Open the index.html file in your preferred web browser.