The fuzz factor represents how similar colors can be considered as equal. It will give poor results for converted videos or photo slide shows, where most pixels between each frame are significantly different. It may give huge file size reduction in some cases when images have large, static areas, e.g., a recorded screen capture of some program. The results heavily depend on the nature of the image. This option keeps the first frame in the background and makes unchanged parts of the following frames transparent. This will not do anything for most GIFs but can be useful in some special cases. This method will search for identical or very similar consecutive frames, remove them and merge their display duration. Useful for long gifs with a high frame rate.Īnother option is to remove only duplicate frames. The frame drop option can remove every second, third, or fourth frame to reduce frame rate and, therefore, file size. It makes multiple variations of your input image, and you can choose the one with the best size/quality ratio for your needs. This tool shrinks the GIF file size by reducing the number of colors in each frame.Įach GIF frame can use up to 256 unique colors, and by reducing this number, you can achieve a smaller file size. This is the default method and should work for any GIF.

You can adjust the compression level with a simple slider to get the best result for your use case. It can reduce the animated GIF file size by 30%-50% at the cost of some dithering/noise. GIF compressor optimizes GIFs using Gifsicle and Lossy GIF encoder, which implements lossy LZW compression.

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