How it works
Drag on the image to draw a selection rectangle. We extract that region from the source image with the Canvas API and re-encode it. Nothing leaves your browser.
FAQ
Why is the default output PNG? PNG is lossless and preserves transparency. If your source has transparent pixels (PNG, WebP), saving as JPEG would force a white background. Pick JPEG only when you specifically want a smaller file and your source is opaque.
How do I make a precise pixel selection? Click and drag on the image. The selection box shows the current pixel coordinates and dimensions in the readout below. The box is constrained inside the image bounds.
Does cropping reduce file size? Yes — fewer pixels means a smaller encoded file. A 50% crop is typically 35–50% of the original size (overhead is fixed, pixels scale).