How to resize a GIF
To resize a GIF, load it, type the new width (the height follows automatically while Keep aspect ratio is on) and press Resize GIF. You can also tap a quick size: 25%, 50%, 75%, 200%, Emoji 128×128 or Fit 480px.
- Keep aspect ratio on: the GIF scales evenly, nothing is stretched.
- Keep aspect ratio off: you can set width and height independently, for example to squash a GIF into an exact slot. The image will be stretched to fit.
Why resizing is the best way to shrink a GIF
A GIF stores every pixel of every frame. Halving the width and height leaves a quarter of the pixels, so the file usually drops to a third or less of its original size, with no extra artifacts. If your GIF is only ever shown small (chat, emoji, a website sidebar), resizing to the displayed size is the single biggest saving. After resizing, the compressor can squeeze it further.
Popular GIF sizes
| Where | Size |
|---|---|
| Discord / Slack emoji | 128×128 (shown smaller) |
| Twitch emote (largest size) | 112×112 |
| Chat reaction GIFs | 320–480 px wide |
| Blog or docs embed | 600–800 px wide |
Resizing GIFs from ChatGPT
GIFs made in ChatGPT come out small, often around 480 pixels wide or less, because all frames share one generated image. Enlarging them makes them softer; shrinking them for emoji works well. See how to make a GIF in ChatGPT.