Client-Side PDF Toolkit
100% Client-Side PDF processing. No server uploads.
About GIF Resizer
The Animated GIF Resizer & Canvas Dimension Scaler resizes animated GIFs proportionally or with custom width/height dimensions, Lanczos3 high-quality resampling, aspect ratio locking, and preserved transparency.
How to Use GIF Resizer
Step 1
Upload an animated GIF file.
Step 2
Enter target width/height or drag the percentage scale slider.
Step 3
Choose resampling filter (Nearest Neighbor for pixel art, Lanczos3 for photos).
Step 4
Click "Resize & Download GIF".
Practical Use Cases for GIF Resizer
Resizing GIFs for Social Media Profile Avatars & Stickers
Resize 800x800 animated GIFs to exact 128x128 or 256x256 dimensions for Discord stickers, Slack avatars, and forum icons.
Downscaling Large Web GIFs to Fit Blog Article Layouts
Scale 1920x1080 animated screen captures down to 720px wide to fit standard blog content columns perfectly.
Input & Output Examples
Downscaling 800x600 GIF to 400x300 (50% Scale)
GIF: `reaction.gif` (800x600, 4.2 MB), Target Width: `400px`
Resized GIF: `reaction_400x300.gif` (1.1 MB) | 73.8% Size Reduction | Crisp downsampled lines
Key Features & Performance
- ✓Resampling Algorithms: Lanczos3 (Crisp Photographic), Bilinear (Smooth), Nearest Neighbor (Pixel Art Preserved).
- ✓Aspect Ratio Lock: maintain original width-to-height ratio or enter custom dimensions.
- ✓Percentage scaling presets: 25%, 50%, 75%, or exact pixel dimensions.
- ✓100% Client-Side Canvas 2D / WebAssembly resizer.
- ✓1-Click Download resized GIF.
Key Terminology & Definitions
Nearest Neighbor Resampling
Scaling an image without anti-aliasing interpolation, preserving the sharp blocky aesthetic of retro pixel art animations.
Lanczos3 Resampling
A high-order sinc windowed filtering method that preserves sharp edges and fine details when downscaling images.