Resize GIF
Set an output width for your GIF; the editor calculates height to keep the proportions. Smaller dimensions can reduce detail as well as file size, so compare the preview at its intended display size.
Resize a GIFNo signup · No uploads · Runs in your browser
Why Resize a GIF?
Resizing changes the pixel area of every frame, but it does not predict the final GIF size exactly. For example, scaling an 800-pixel-wide image to 480 pixels at the same aspect ratio leaves 36% of the original pixel area per frame. The encoded file-size change also depends on motion, palette, frame count, and how neighboring frames differ.
If a GIF must fit a particular upload limit, check the current rules for that destination and compare the measured output against them. Resizing may help, but trimming the clip or lowering the frame rate can matter more for some animations. No width guarantees a particular byte size.
Choose dimensions for the actual display area. A small inline illustration may need far fewer pixels than a full-width presentation image. Preview the resized GIF at its expected display size; increasing dimensions cannot restore details that were not present in the source.
Choose a Width for the Display
| Starting point | Try this width |
|---|---|
| Small inline preview | 240–320 px |
| Chat or issue description | 320–480 px |
| Documentation or article | 480–640 px |
| Large presentation area | 640–960 px |
How GIF Resizing Works
This tool uses FFmpeg WebAssembly with the Lanczos scaling algorithm. Lanczos is a high-quality resampling filter that applies a windowed sinc function to compute each output pixel from a weighted average of nearby input pixels. The result is sharper edges, less blurring, and fewer aliasing artifacts compared to simpler algorithms like bilinear or nearest-neighbor scaling.
The scale=W:-1 filter tells FFmpeg to set the width to the value you specify and automatically calculate the height to preserve the original aspect ratio. The -1 in the height position is FFmpeg's shorthand for "compute this dimension automatically."
The editor re-encodes the animation at the chosen dimensions. Re-encoding can affect frame timing, palette, and visual detail, so preview the result and compare playback with the source.
How Resizing Affects File Size
At the same aspect ratio, changing width from 800 to 480 pixels changes the pixel area per frame to 36% of its original value. That is a 64% reduction in pixel area, not a promise that the exported file will be 64% smaller. GIF compression depends on the image content and differences between frames.
Frame rate and dimensions affect different parts of the animation. Lowering frame rate removes frames; reducing width scales the pixels in each remaining frame. Try one change at a time and compare the measured output and motion so you can see which trade-off works for your file.
Resize Your GIF Now
Enter your target width in the editor. Height is calculated automatically. No uploads needed.
Open the EditorFrequently Asked Questions
Does resizing a GIF reduce its file size?
It often reduces the size, but the amount depends on the animation. Smaller frames contain fewer pixels, while motion, frame count, and palette complexity also affect encoding. Check the output size rather than assuming a fixed percentage.
Will resizing reduce the GIF quality?
Downscaling removes detail, and the appearance depends on the source and display size. Set dimensions for the intended use, preview at that size, and keep the original if you may need full resolution later.
Can I make a GIF larger (upscale) with this tool?
Yes — enter a width larger than the original. However, upscaling cannot add detail that was not in the original. The output will look blurry or blocky because the Lanczos filter is interpolating pixels that do not exist in the source. Upscaling only makes sense if the destination display requires a specific larger size.
What width should I use for different platforms?
Measure the intended display area and use that as a starting point. The width examples above are not platform requirements; preview the result where it will appear and check the destination’s current upload limit.
Does the tool change the GIF frame rate when resizing?
Resizing changes the pixel dimensions and re-encodes the animation. The editor also offers a frame-rate control, so verify timing and smoothness in the result rather than assuming the original timing is unchanged.