Image Cropper

Crop one image

1. Choose one local JPG, PNG or WebP. The tool reads an oriented still snapshot and starts with the full image selected; it does not preserve animation.
2. Move or resize the selection, type into the labelled pixel fields, or use their decrease and increase buttons without dragging. Choose Free for arbitrary integer dimensions, or a fixed aspect preset for a centered starting crop.
3. Choose PNG or JPEG and select Crop image. Check the actual result dimensions and preview, then download the generated file. Changing a crop or format removes the previous download.

Understand the selected pixels

Cropping removes pixels outside a rectangle; resizing changes how many pixels represent the image. This tool does not enlarge or shrink the selected region. A crop that is 600 pixels wide downloads at 600 pixels wide, even if its on-page preview looks smaller.

Left and Top count pixels from the top-left corner of the image after its stored orientation has been applied. Both start at zero. Width and Height must be positive, and the complete rectangle must fit inside the source image.

Selecting a fixed preset creates the largest centered crop made of exact ratio-sized pixel blocks. For 4:3, widths are multiples of four and heights are the matching multiples of three. Odd unused pixels remain on the right or bottom; choose Free when you need another exact size.

PNG retains available transparency. JPEG places transparent areas on white and uses the browser's 0.92 quality hint, which is not a 92 percent file-size reduction. Browser color handling and re-encoding can change file size, metadata or pixel representation.

Check an ordinary crop

An 800 by 600 image becomes a centered 600 by 600 square with Left 100 and Top 0. Its output is still 600 by 600 pixels; no automatic resizing is added.

A 16:9 crop of the same image uses Left 0, Top 75, Width 800 and Height 450. A 3:2 preset uses Left 1, Top 34, Width 798 and Height 532 so that the ratio is exact in whole pixels.

Use Load example to try a local four-color image. Move the crop to different quadrants, or edit the pixel fields to see how the visible selection and the generated result correspond. No example image is fetched from another site.

Formats, capacity and preservation limits

One nonempty JPEG, PNG or WebP up to 20,000,000 source bytes is supported. After native decoding, each oriented dimension must be at most 16,384 pixels and the total at most 40,000,000 pixels. These are admission bounds, not a pre-decode memory guarantee; a browser can still fail on a complex image below them.

The output must be a verified PNG or JPEG no larger than 40,000,000 bytes. A large PNG can be bigger than the original. If generation fails, choose a smaller crop or another available format; the tool does not silently shrink the image or substitute a different file.

This is not a batch editor, animation-frame selector, circular crop, background remover, rotator or secure-redaction service. Re-encoding does not deliberately copy the original metadata container, but it is not a metadata-removal or forensic-sanitization guarantee.

Local files and explicit download

Tool processing uses your selected image in this browser without tool-added uploads, saved input history or file data in page URLs. Download creates a local file only when requested. Normal site services and consent settings remain separate.