Making a transparent GIF is quick and straightforward, and you don’t need to create an account to do so. Removebackground is an open-source project made by nadermx. You can use scale to easily scale an image by a given factor, but you can also use -resize-fit-height or -resize-fit-width to scale to respective sizes. Although not as powerful as the first two tools, the results are satisfactory, and the software is free to use. The simplest way to create an animation is to give more than one input file, which gifsicle will combine to create a flipbook'' animation: gifsicle pic1.gif pic2.gif pic3.gif > animation. Gifsicle -resize 300x200 -i animation.gif > animation-clipped.gif gif gifsicle is good at creating and manipulating GIF animations. Gifsicle -resize-fit-height 100 -i animation.gif > animation-100px.gif # Scale to a given height with unspecified width Gifsicle -resize-fit-width 300 -i animation.gif > animation-300px.gif where anim.gif and animtrans.gif are the source and destination file names, and ffffff is the hex code of the color you want to make transparent (here, pure white). # Scale to a given width with unspecified height You can do this with GIFsicle, using the following options: gifsicle -U -disposalprevious -transparent'ffffff' -O2 anim.gif > animtrans.gif. Gifsicle -scale 0.5 -i animation.gif > animation-smaller.gif That's nice but you want to keep the GIF animated, right? Here are a few easy methods for resizing a GIF with gifsicle: If you try to use ImageMagick's basic resize functionality, you'll end up getting the first frame output to the correct size. Unoptimizing animations, which makes them easier to edit. Gifsicle’s optimizer is pretty powerful, and usually reduces animations to within a couple bytes of the best commercial optimizers. You can also use transparency to make them even smaller. I showed you how to merge and optimize animated GIFs with gifsicle, and now let's look at resizing animated GIFs. This stores only the changed portion of each frame, and can radically shrink your GIFs. My favorite image manipulation utility, ImageMagick, doesn't seem to be the best utility for animated GIFs - another utility called gifsicle is as good as it gets. GIFs are kind of a video file, because they have frames, but there's no real control over how they play or loop. Animated GIFs are images but you can't really handle them link other types of images, like PNGs or JPEGs or even WebPs.
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