How to use
- Drop a video or screen recording on the box.
- Set the start and end times. GIFs grow quickly, so a few seconds is best.
- Choose frame rate and width: 12 fps at 480 px suits most chats and docs.
- Press Convert and download the GIF.
Tips for small GIFs
- Keep it short: 3 to 6 seconds is usually enough.
- Lower the width: 480 px is plenty for chat and documentation.
- Use 10–12 fps for screen recordings, 15–20 fps for motion.
- For long clips, an MP4 is often 10 times smaller than a GIF.
Open-source software
Conversion is done by FFmpeg compiled to WebAssembly by ffmpeg.wasm (MIT). The FFmpeg core used here includes components licensed under the GPL; their source code is available from those projects. The converter (about 31 MB) is downloaded from the jsDelivr CDN the first time you convert, then cached by your browser.
Frequently asked questions
Is my video uploaded?
No. The video is processed by your browser on your own device. Only the converter program itself is downloaded.
Why is it slower than desktop software?
Browsers run the converter on a single CPU core without hardware acceleration. Converting a 1-minute 720p video usually takes one to a few minutes. Copying H.264 into MP4 or MOV without re-encoding takes seconds.
Is there a size limit?
There is no fixed limit, but browsers can only use a few GB of memory. Files up to a few hundred MB usually work; very long or 4K videos may fail.