How to Resize a GIF Online (Without Losing the Animation)

Use PixelTools' free resize tool to shrink an animated GIF without breaking the animation. Upload the GIF, set a new width or height (or pick a preset), and download the result — every frame is resized and the file is re-encoded as a new animated GIF, so it keeps playing exactly as before, just smaller. Processing happens entirely in your browser: the file is never uploaded to a server, which also makes it fast even for GIFs with a lot of frames.

Many online "image resizers" load a GIF into an `` or `` element and export whatever is currently displayed — which is a single static frame. The result looks fine as a thumbnail but has silently lost the animation. To resize a GIF correctly, a tool needs to decode every individual frame, resize each one, and re-encode them back into a new animated GIF with the original timing preserved. PixelTools' resize tool does this frame-by-frame pass automatically whenever it detects an animated GIF — you don't need to pick a special mode.

These solve different problems. Resizing changes the pixel dimensions (width × height) — fewer pixels per frame means a smaller file, but it also makes the GIF physically smaller wherever it's displayed. Compressing keeps the dimensions the same but reduces the color palette or frame count to cut file size. For GIFs specifically, dimensions matter more than for static images: a GIF stores that pixel data once per frame, so halving the width and height of a 100-frame GIF can cut the file size by roughly 75%. If you need a GIF under a specific size limit (Discord's 8-25MB, Slack's 1MB for a good in-line preview, etc.), resizing down is usually the fastest way to get there.

• Slack / Discord chat: 400–500 px wide is plenty for an inline preview and keeps the file small
• Twitter/X or a blog post: 480–600 px wide balances clarity and load time
• Email signature or embedded widget: 200–300 px wide, since it plays automatically and shouldn't dominate the layout
• Presentation slide: match your slide's resolution (e.g. 1280 × 720) so it doesn't get upscaled and blurry

When in doubt, resize by width and let height scale proportionally — this keeps the aspect ratio intact and avoids a stretched or squashed animation.

Shrinking a GIF's dimensions doesn't reduce color quality — each resized frame is re-quantized against a fresh color palette, so colors stay accurate at the new size. What does affect visual quality is the GIF format's inherent 256-color-per-frame limit, which is unrelated to resizing and present in the original file too. If a resized GIF looks noticeably rougher than the source, it's usually because fine detail that fit in the original resolution no longer fits in fewer pixels — not because of the resize process itself. For GIFs with smooth gradients or photographic content, expect some banding at any size; that's a GIF format limitation, not a resizing artifact.