Private GIF tool
Optimize GIF
Compress a GIF by rebuilding its color palette with fewer colors. Your GIF is handled locally and is never uploaded.
File
No GIF selected yet.About browser GIF optimization
This tool runs locally with ffmpeg.wasm. It reads the GIF in your browser, generates a new limited color palette, and re-encodes the animation so you can download an optimized copy.
The first run downloads the roughly 31 MB media engine once. GIF optimization is memory-heavy, so the tool is intended for short GIFs rather than long clips or huge source files.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a server. Close the tab and nothing is left behind. It even keeps working if you go offline after the page loads.
This is true for every tool on this site. Curious how that works? Read how browser-side processing works.
FAQ
Are GIF files uploaded for optimization?
No. The selected GIF is processed locally in your browser and downloaded from a local blob URL.
How does color count affect size?
Lower color counts usually make smaller GIFs, but heavy reductions can create banding or flatter-looking animation.
Why does the first run download an engine?
Optimization uses ffmpeg.wasm. The roughly 31 MB engine is downloaded once per tab session and reused by the GIF tools.
Is Optimize GIF the same as resizing?
No. This tool keeps the frame dimensions and reduces palette colors. Use Resize GIF when width is the main problem.