Image Cropper

Source
Click Load image.
Preview
No crop yet.

How to crop?

Load an image, then adjust the white rectangle with your mouse (drag to move, resize via the corners). Pick a fixed ratio if needed (1:1, 16:9, etc.), then click "Crop" to see the preview and "Download" to save the file.

Formats

PNG (with transparency), JPEG (lighter, no transparency), WebP (modern, very compact). All processing runs locally in the browser via Canvas.