MP4 to GIF Converter

Animated GIFs remain the universal language of the internet — they autoplay everywhere, embed in chat, work in email, and render in pull requests. But most online MP4-to-GIF converters require you to upload your video to a remote server. That is slow, often capped at 50 MB or less, and a problem if your footage contains anything sensitive: product mockups, internal screen recordings, private moments.

This tool runs FFmpeg.wasm — a WebAssembly build of the FFmpeg multimedia framework — directly inside your browser. Your video file is read into browser memory, the conversion happens locally on your CPU, and the output GIF is generated client-side. Nothing is uploaded. Nothing is logged. Close the tab and the file is gone.

How the two-pass conversion works

GIF only supports 256 colors per frame. A naive single-pass conversion picks colors greedily and produces visible banding. We use the standard two-pass approach: first FFmpeg analyzes the video and builds an optimized color palette tailored to your specific clip; second, it encodes the GIF using that palette with dithering to smooth gradients. The result is dramatically better quality than what most online converters produce.

Picking the right settings

• Frame rate: 15 FPS is the sweet spot for most GIFs. 10 FPS is fine for slideshows and screen recordings; 24-30 FPS makes file sizes balloon.
• Width: 480 pixels is great for inline embeds. 320 is best for chat platforms and email. 720 is overkill for most use cases.
• Quality: "Balanced" uses Bayer dithering — fast and clean. "Best" uses Sierra dithering for the smoothest gradients but produces slightly larger files. "Small" disables dithering for the tiniest output.
• Duration: Keep clips under 10 seconds for shareable file sizes. GIF compression scales linearly with duration.

When to use GIF vs MP4

GIFs are perfect for short, looping animations that need to autoplay anywhere — README files, Slack messages, email, and chat platforms. For anything longer than 10 seconds, or anything with sound, use MP4 or WebM instead. They will be 10-50x smaller at the same quality. If you already have a GIF and want to shrink it, try our GIF to MP4 converter.