How to Make a GIF Smaller

Whether you need to hit Slack's 1 MB limit or just want a faster-loading GIF, these three methods cover every scenario.

Step-by-step guide

1
Open GifMash and upload your GIF
Visit gifmash.com and drop your GIF onto the upload area. Your file never leaves your browser.
2
Pick the right method
Quality mode: drag the slider down. Target Size: enter your limit in KB. Dimensions: enter a smaller width to scale the GIF down.
3
Compress and download
Hit Compress and download the result. The before/after size comparison is shown automatically.

Make my GIF smaller

Free GIF compression — quality, size, and dimension modes available.

For a specific platform limit, use Target Size mode — it binary-searches to the exact KB you specify.
Resizing to 50% of the original width reduces file size to roughly 25%.
Combining quality reduction + resize gives the maximum compression.

What's the quickest way to make a GIF smaller?

Upload to GifMash, drag the Quality slider to 60%, and click Compress. Most GIFs shrink 30–50% instantly.

How small can I make a GIF without it looking broken?

It depends on the content. Simple animations can go to 32 colors and small dimensions with minimal visible impact. Photographic GIFs degrade faster.