GIF Cropper

Cropping a GIF in an ordinary image editor usually keeps only the first frame. This cropper cuts the same area out of every frame of an animated GIF and writes a new GIF with the same delays, loop setting and transparency — useful for square avatars and emoji, vertical stories, or simply removing borders and captions. Pick an aspect ratio and a position, or type an exact box in pixels; a preview of the first frame shows what is kept. It runs entirely in your browser, without the video engine.

How to use this tool

1. Choose one or more GIFs.
2. Pick a ratio (1:1, 16:9, 9:16, 4:5 …) and the position of the crop, or choose "Exact box" and enter x, y, width and height in pixels.
3. Use "Crop size" below 100% to zoom in on that position.
4. Check the yellow box in the preview and download the cropped GIF.

Formula

Largest box with ratio r: if width ÷ height > r, box = (height × r) × height, otherwise width × (width ÷ r)

The box is then scaled by the crop size and placed at the chosen position. Every frame is first drawn completely (applying the GIF's disposal rules), then cut, so frames that only update part of the picture are cropped correctly. Each output frame gets a palette with its exact colours; unchanged areas are stored as transparent over the previous frame, which keeps the file small.

Example

A 480 × 270 GIF cropped to 1:1 in the centre: 480 ÷ 270 > 1, so the box is 270 × 270, placed at x = (480 − 270) ÷ 2 = 105. At a crop size of 50% the box becomes 135 × 135 at x = 172, y = 68.