Low-quality image placeholders ... is packed into a single CSS integer, which is decoded directly in CSS (no need for any JavaScript) to dynamically generate an image that renders immediately.

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 ...

Open an HTML ... images that contain text. You may discover a new appealing look that works better than the existing one. Any time you increase an image's dimensions using CSS, the image's quality ...