Image Cropper

Custom mode gives you a free-form crop with adjustable aspect ratio, handled entirely by your browser's canvas — nothing is uploaded to a server, so your image never leaves your device. Social Media mode goes a step further: it runs a small face-detection model locally to auto-center the crop on the main subject before generating every platform's preset sizes at once.

Because everything runs client-side, there's no file-size limit imposed by an upload, and it works offline once the page has loaded. Download presets individually or grab all of them at once as a zip.