GIF to MP4 Converter — High-Efficiency Video
Convert animated GIFs to modern H.264 MP4 video directly in your web browser using WebAssembly. MP4 video files are up to 90% smaller than equivalent GIF files, stream instantly without buffering, and support millions of colors instead of GIF's 256-color limit. With even-dimension padding and fast-start flags enabled, output videos play seamlessly on iOS, Android, and web platforms.
Use Cases
How to convert an animated GIF to MP4 video
Drag and drop your GIF animation or select it from your device. Files up to 50 MB are supported.
Click Run to load the WebAssembly video engine and transcode the animation into an H.264 MP4 file.
Verify video playback, compare the compressed video size against the original GIF, and download the MP4.
Frequently Asked Questions
- Why is MP4 so much smaller than GIF?
- GIF stores full uncompressed or LZW frames with a 256-color palette. MP4 uses advanced H.264 inter-frame motion compression, typically reducing file size by 80% to 90% while improving visual quality.
- Why are video dimensions rounded to even numbers?
- H.264 YUV420p chroma subsampling requires video width and height to be divisible by 2. Our transcoder automatically pads odd-dimension GIFs by 1 pixel to guarantee playback compatibility.
- What does the +faststart flag do?
- The +faststart flag moves the MP4 index metadata (moov atom) to the beginning of the file, allowing videos to start streaming immediately in browsers before fully downloading.
- Does video encoding happen on a remote server?
- No. Transcoding runs completely on your device using ffmpeg compiled to WebAssembly. Your files never leave your computer or phone.
Your GIF is converted to MP4 locally in your browser via WebAssembly without uploading any video data.
Related tools
More free, in-browser tools from the GIF Tools set — every one runs locally, with no sign-up and no upload.