About GIF Resizer

What is GIF Resizer?

GIF Resizer (gifresizer.org) is a free online toolkit for working with animated GIFs. You can resize, compress, crop, rotate, reverse, and convert GIFs — to MP4 or WebP — without installing software, creating an account, or uploading a single file.

Every tool runs locally in your browser using WebAssembly (ffmpeg.wasm). Your files never leave your device, which makes the tools fast, private, and safe to use with anything from memes to confidential design work.

Why we built it

Most online GIF tools upload your files to a server, add watermarks, limit file sizes, or hide features behind a paywall. We wanted a simpler answer: professional-grade GIF processing that respects your privacy and costs nothing.

Because processing happens on your own device, we have no server costs to pass on — so every tool stays free, with no watermarks and no sign-up. The site is supported by unobtrusive advertising.

How the tools work

• Lanczos scaling keeps edges sharp when resizing
• Palette regeneration (palettegen + paletteuse) rebuilds an optimized 256-color palette after every operation
• Platform presets target Discord, WhatsApp, Slack, Reddit, and email size limits in one click
• Format conversion to MP4 and WebP for dramatically smaller files

Get in touch

Questions, bug reports, or feature ideas are always welcome. Reach us through the contact page or email us at hello@gifresizer.org.