Is cropping better than reducing colours?

Usually. Cropping removes pixels entirely and costs nothing in quality, while reducing colours degrades every frame that remains.

Can I crop each frame differently?

No. One region is applied to every frame, which is what keeps the animation coherent — a moving crop would need keyframes and a very different tool.

What happens if the crop goes past the edge?

The area outside the original comes out transparent rather than the crop being rejected.

GIF Cropper

Crop an animated GIF to a region, applied across every frame.

Runs in your browserNo account neededFree

Processing: This tool runs entirely in your browser. Your input and any file you open stay on your device — nothing is uploaded to a server.

How to use the gif cropper

Choose a GIF.
Set the offset from the left and top, and the width and height to keep.
Rebuild and download.

About this tool

Cropping is the most effective way to make a GIF smaller, and it is usually overlooked in favour of reducing colours. A screen recording with a browser chrome and a desktop background around it is mostly pixels nobody needs: removing them cuts the file roughly in proportion to the area removed, without touching quality at all.

The crop is applied to every frame at the same position, which keeps the animation coherent. Regions outside the original are filled transparently rather than rejected, so a crop that overhangs an edge still produces a usable result.

Browsers display animated GIFs and offer no way to read their frames — draw one to a canvas and you get the first frame only. The GIF is therefore decoded by an implementation on this page: header, colour table, LZW-compressed image data, and the disposal model that composes each frame onto the last. That last part is the one usually skipped, and skipping it is why frames come out of some tools with holes in them, since most GIFs store only the pixels that changed between frames.

Rebuilding means re-encoding, and a GIF holds at most 256 colours. The palette is recomputed from frames sampled across the whole animation rather than per frame, because a per-frame palette is larger and makes colours shift visibly as it plays.

Common uses

Cutting the browser chrome out of a screen recording.
Focusing an animation on the part that matters.
Reducing a file by removing empty space.

Frequently asked questions

Is cropping better than reducing colours?: Usually. Cropping removes pixels entirely and costs nothing in quality, while reducing colours degrades every frame that remains.
Can I crop each frame differently?: No. One region is applied to every frame, which is what keeps the animation coherent — a moving crop would need keyframes and a very different tool.
What happens if the crop goes past the edge?: The area outside the original comes out transparent rather than the crop being rejected.

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