TinyPNG reduces the file size of PNG and JPEG images by selectively reducing the number of colors, merging shades that are hard for the human eye to distinguish. The result is often a 50–80% reduction with no visible loss in quality. You drag files onto the page, wait a few seconds, and download the compressed versions. There is no registration and no software to install.

For web developers and designers, smaller images mean faster page loads, lower bandwidth costs, and better scores on performance audits. TinyPNG also offers a paid API for automated compression in build pipelines and a Photoshop plugin. It is one of those tools that is easy to overlook until you see how much difference it makes on a page with many images.