GIF Resizer
Resize animated GIFs online without losing the animation. Scales every frame with palette-optimized re-encoding — free, private, in your browser.
What is the GIF Resizer?
The ByteTools GIF Resizer scales an animated GIF to a new width while keeping the animation intact — every frame is resized with a high-quality Lanczos filter, and a fresh 256-color palette is generated from the resized frames so colors stay clean.
- Keeps the animation — every frame is resized
- High-quality Lanczos scaling
- Fresh palette per resize for clean colors
- Aspect ratio preserved automatically
- 100% local — your GIF is never uploaded
How to use the GIF Resizer
- 1
Drop an animated GIF onto the box or click to browse for one.
- 2
Set the new width in pixels — the height follows automatically to keep proportions.
- 3
Click Resize GIF.
- 4
Preview the animation and download the resized GIF.
About the GIF Resizer
The ByteTools GIF Resizer scales an animated GIF to a new width while keeping the animation intact — every frame is resized with a high-quality Lanczos filter, and a fresh 256-color palette is generated from the resized frames so colors stay clean. The aspect ratio is preserved automatically.
It is the fix for GIFs that are too large for a chat app, forum avatar slot, README banner or email signature. Shrinking a GIF's dimensions is also the single most effective way to cut its file size, since GIF data grows roughly with the pixel count of every frame.
Everything runs 100% locally in your browser — the GIF is never uploaded. Re-encoding a long GIF with many frames takes a moment, but typical short loops finish quickly.
Frequently asked questions
How do I resize a GIF without losing the animation?
Use a tool that re-encodes every frame rather than just the first one. Drop your GIF here, enter a new width and click Resize GIF — all frames are scaled together and the timing and looping are preserved.
Does resizing a GIF reduce its file size?
Yes, dramatically — GIF size scales roughly with the pixel area of the frames, so halving the width roughly quarters the file size. Resizing down is the most effective single lever for shrinking a GIF.
Can I make a GIF bigger with this tool?
You can enter a width larger than the original, but enlarging cannot add detail — the frames are interpolated and will look progressively softer. GIFs generally look best at or below their original size.
Will the colors change after resizing?
The tool generates a brand-new optimized palette from the resized frames, so colors typically look as good as the original. This avoids the washed-out or banded look that generic resizers produce with a fixed palette.
Is my GIF uploaded anywhere?
No. The resize runs entirely in your browser using WebAssembly — the file never leaves your device, and there are no watermarks, accounts or limits.
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