GIF Optimizer

The GIF Optimizer re-encodes an animated GIF with a reduced color palette to shrink its file size, all in your browser without uploading the file to a server. GIFs store a separate palette of up to 256 colors per file, and most animations look perfectly acceptable with far fewer colors, so trimming the palette to 64, 32, or even 16 entries can cut the file size dramatically while preserving the motion.

Under the hood, the tool decodes each frame, builds a quantized color table from the actual pixels used, and remaps the animation to that smaller palette before re-encoding. Because GIF uses lossless LZW compression on indexed pixels, fewer distinct colors means longer runs of repeated index values, which compress more tightly. Flat illustrations, screen recordings, and meme-style clips respond especially well; photographic gradients with subtle color shifts tend to band more visibly.

Common use cases include slimming down GIFs for email signatures, chat platforms with attachment limits, README demos, and faster-loading web embeds. If you need smaller dimensions rather than fewer colors, reach for the GIF Resizer instead, and if you want to drop frames or change timing you may pull frames out with the GIF Frame Extractor first.

For best results, preview the output at the palette size you choose and step down gradually rather than jumping straight to 16 colors. Combining a modest palette reduction with a small dimension cut usually beats an aggressive palette crush alone, and converting simple loops to a modern format with the APNG/WebP Converter often yields even smaller files when your target platform supports it.