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GIF Resizer

Resize animated GIFs in your browser while preserving every frame's animation and timing. Lock aspect ratio, adjust colors, fully private.

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Select a GIF

Accepted: image/gif

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GIF Resizer

Resize an animated GIF while preserving every frame and its timing. Whether you need to shrink a large GIF for messaging, enlarge a small one for a presentation, or hit a specific size for social media, this tool keeps the motion smooth and the colors crisp.

How it works

The tool decodes every frame of your GIF using the browser's native ImageDecoder API, draws each frame to a resized canvas with high-quality smoothing, and re-encodes the result with a fast pure-JS GIF encoder. Per-frame delays are preserved exactly.

Features

Lock or unlock aspect ratio
Custom width and height up to 4096px
Adjustable color depth (2–256 colors)
Side-by-side before/after preview
100% local processing
Works in modern Chromium and Firefox browsers

Use cases

Compress oversized GIFs for messaging apps
Generate consistent sizes for sticker packs
Optimize for chat platforms with size limits
Resize tutorial GIFs for blog posts
Create thumbnails of larger animations
Hit exact pixel dimensions for documentation

Tips

Shrinking a GIF dramatically reduces file size; enlarging adds size and may show some pixelation. Lock aspect ratio for natural-looking results. Lowering color depth to 64–128 trims file size further with minimal visual impact.