Every tool in this section runs on your browser's own canvas engine: images are decoded, processed and re-encoded on your device, never uploaded. That makes them fast (no upload wait), private (screenshots with sensitive data never leave your machine) and free to run at any volume.
The workhorses: the Image Compressor for shrinking photos before publishing, Compress to Target Size when a form demands 'under 100 KB', the WebP Converter for modern page-speed wins, and the Favicon Generator for shipping a complete icon set from one logo.
What the browser can and cannot do here is worth knowing up front. Everything runs on the canvas engine already in your browser, which decodes JPG, PNG, WebP and GIF but not camera RAW, and not HEIC outside Safari, because no other browser ships a decoder for it. The order that gives the best result is almost always the same: resize to the dimensions you will actually display, then compress, then convert the format last.