CompressFast is a browser-based tool that allows users to compress images without uploading them. It supports various image formats, including PNG, JPEG, WebP, AVIF, GIF, BMP, SVG, and HEIC. The tool provides a simple interface where users can drag and drop or click to browse images, with support for batch processing of up to 20 images, each up to 10 MB. CompressFast also offers quick tools for specific image compression and conversion tasks, such as compressing PNG or JPEG images online, or converting images to WebP.