Edit GIF
Resize GIF
Change the width or height of an animated GIF while keeping all frames and animation timing intact. Perfect for resizing GIFs to fit platform requirements, reduce file size, or create thumbnails.
100% Private — files never leave your browser. No upload, no server, no watermark.
Last updated: June 2026
How to resize a GIF online
- Upload your GIF. Drag it onto the tool or click Browse. All processing is in your browser.
- Enter new dimensions. Type the desired width. Height updates automatically with aspect ratio locked. Uncheck the lock for free resize.
- Click Resize GIF. Each frame is drawn onto a resized canvas using bilinear scaling, then re-encoded into a new GIF.
- Preview and download. The animated preview shows the result at the new size. The download button saves the resized GIF.
Why resize a GIF?
- Reduce file size. Going from 720px to 480px wide cuts pixel count by ~56%, significantly shrinking the file.
- Fit platform requirements. Some platforms have dimension limits for animated images.
- Create thumbnails or previews. A small 120×90 version can be used as a preview card that links to the full-size GIF.
- Standardize a collection. If you have GIFs of different sizes, resize them all to the same width for a consistent gallery.
Privacy notice
Your GIF is decoded and re-encoded entirely within your browser using gifuct-js (decode) and gif.js (encode). No file data is sent to any server. The tool works offline once the page and CDN libraries have loaded.
Frequently Asked Questions
Does resizing affect the animation speed?
No. Frame delays are preserved exactly. Only the canvas dimensions change.
Can I make a GIF larger?
You can upscale a GIF, but GIF frames are rasterized — making them larger will look blurry. Downscaling always produces cleaner results.
What is the maximum output size?
The tool supports output up to 1920×1080.
Does this maintain aspect ratio by default?
Yes, by default the aspect ratio is locked. You can uncheck the lock to set width and height independently.
Is there a limit on the number of frames?
There is no hard frame limit, but GIFs with thousands of frames at large dimensions may take longer to process.