Convert an animated GIF to MP4 for smaller files, smoother playback, and uploads that don't get rejected.
Drop one or many - all convert to MP4. Per-row progress, batch convert, ZIP download.
Animated GIFs are huge - often 5 to 10 times the size of an equivalent MP4 at worse quality. Every modern messaging platform, social network, and CMS prefers MP4: smaller files, better quality, real audio support (even if your GIF is silent). Converting a GIF to MP4 is the fastest single change you can make to reduce a video asset's bandwidth bill.
Conversion uses our FFmpeg wasm engine in your browser - it understands GIF frames and re-encodes them as an H.264 MP4 with a fast-start moov atom for instant playback. The wasm engine downloads ~22 MB on first use (cached after). Expect the output to be 80-90% smaller than the source GIF at visually identical quality.
Why are GIFs so big? The format dates to 1987 and uses a 256-color palette per frame plus a primitive run-length compression. Modern video codecs use motion estimation (storing only the differences between frames), variable quantization (spending bits where the eye notices), and entropy coding tuned to natural video signal. The result: an MP4 carrying the same visual content as a GIF at one-tenth the file size, often higher color fidelity to boot. GIF survives only because of inertia and the lack of in-line video in some platforms.
The most common scenarios for this conversion: hosting a GIF on your own website (smaller MP4 = lower bandwidth bill), sharing in Slack or Discord where MP4 plays inline as a video and GIF gets converted server-side anyway, embedding in GitHub README files (GitHub accepts MP4 in markdown blocks), and uploading to social platforms that prefer video posts over GIF attachments. In most of these, the recipient experience is identical or better; the savings are pure win.
A note on autoplay and loop. The HTML5 video element needs explicit attributes to behave like a GIF: muted, autoplay, playsinline, loop. Subformer's MP4 output works fine with any of those, but the player has to be configured. On social platforms that's handled by their video pipeline automatically; on self-hosted sites you set it once in the video tag. GIF's "loop forever, autoplay" is built in; MP4 needs configuration. Worth knowing if you've previously dropped GIFs into an img tag and they "just worked".
Self-hosting GIFs is expensive at scale. A 10x smaller MP4 cuts your CDN bill by the same factor with no visible change for visitors.
GitHub markdown supports MP4 via the <video> tag (uploaded as an attachment). Smaller files = faster repo browsing.
Both platforms render MP4 inline as a video player with native controls. Smaller files upload faster too.
iPhone Photos and Android Gallery handle MP4 natively. GIFs technically work but sit in an awkward "Animated" bucket on iOS.
Twitter converts GIF uploads to MP4 server-side anyway. Pre-converting lets you control the encoding quality.
Premiere, DaVinci Resolve, and Final Cut prefer MP4 sources. Editing a GIF directly is awkward; the MP4 drops into a timeline cleanly.
Animated GIF is the classic short-loop image format. Plays in every browser and chat app, but is heavy and lossy compared to modern video formats like MP4 or WebM.
MP4 is the most widely supported video container, based on the ISO Base Media File Format. It can carry H.264, H.265 and AV1 video with AAC, MP3, or Opus audio.
Drag a GIF onto the converter above, or click the box to pick one from your device.
We've preselected MP4 as the output format. Change it from the dropdown if you want a different target.
Click Convert and wait for the progress bar to finish. Download the MP4 when it's ready.
Convert an MP4 to WebM for smaller file sizes and open-source-friendly web delivery.
Turn a QuickTime MOV (from your iPhone or Mac) into an MP4 that plays everywhere - in seconds, in your browser.
Convert a WebM video (downloaded from YouTube, Twitter, or a web recorder) to MP4 - fast, in your browser, no upload.