Start with dimensions that fit the destination
A large animation contains more pixels to encode in every frame. Choose a width ceiling of 320, 480 or 640 pixels based on how the GIF will be displayed. This tool preserves aspect ratio, limits height to 640 pixels and never enlarges a smaller source. A portrait animation may end up narrower than the selected ceiling because height is the limiting dimension. After resizing, inspect small labels and icons at the intended display size before deciding the result is usable.
Use the smallest palette that keeps the image clear
GIF uses indexed color, with at most 256 entries in a frame palette. This page offers 32, 64, 128 or 256 colors per frame. A simple illustration may remain readable with fewer colors, while faces, shadows and gradients can show visible banding. The tool generates new palettes from the decoded frames, so this is not a promise of unchanged quality. Try one palette reduction at a time and compare areas where neighboring colors need to remain distinct.
Reduce frames while keeping the pace
The maximum frame rate is 10 or 15 fps. The engine can skip frames and extend the time assigned to retained images, preserving the overall pace rather than making the action run faster. It also carries over the loop setting. This is useful for slow demonstrations, but fast movement may look less smooth. The source must fit the 15-second and 600-frame limits; the tool rejects an overlong animation instead of silently cutting off its ending.
Compare the result and check the white background
Compression decodes the GIF and writes a new one. Transparent pixels are composited onto white, so a transparent sticker may no longer fit a dark page after processing. The output can also grow if the source already uses efficient encoding. The result reports the actual size change, including when it is not smaller. Keep the original and compare both appearance and bytes before replacing it. GIF has no audio track, so this process only changes the images and their timing.
