GifSlim

GifSlim is a browser-based GIF optimizer for lighter uploads. Drop a GIF up to 20 MB and reduce its colors while keeping the original width, height and frame timing, or set a target size in KB or MB and choose whether smaller dimensions or fewer frames are acceptable. A side-by-side comparison shows real file sizes before download, and the compressor never returns a larger file than the original. It can also turn a short video clip or screen recording into an animated GIF. All processing happens locally in your browser, so your GIF or video is never uploaded.