GIF Resizer

Scale an animated GIF to new pixel dimensions while keeping every frame and the timing.

Animated GIF

New width (px)

New height (px)

Quality (1 = best)

Keep aspect ratio (height follows the width)

Dither (smoother gradients, larger file)

How it works

Every frame of the animation is decoded and redrawn at the new size, then re-encoded — the animation and its timing are preserved.
Leave "keep aspect ratio" ticked to change only the width; the height is calculated for you. Untick it to force an exact width and height.
Quality controls the palette per frame: 1 keeps the most colours (largest file), 30 the fewest.
Decoding and encoding run in your browser; the GIF is never uploaded.