Convert WebM to GIF
Convert WebM to GIF online free: browser and screen recordings become looping GIF animations for chats, docs and slides. Nothing is uploaded. No sign-up.
GIFs are made at 12 FPS, up to 480 px wide, from the first 60 seconds at most. Trim, frame rate and colours: open Video to GIF
WebM
WebM is the web’s open video format: screen recorders, browser extensions and sites that save clips with the MediaRecorder API produce it, with VP8, VP9 or AV1 video and Opus sound.
QuickTime, iMovie, many video editors and upload forms don’t accept WebM, while MP4 with H.264 plays everywhere.
WebM to GIF: remux or re-encode
A GIF has no video codec: every frame becomes a picture with at most 256 colours. Nibbo samples the WebM at 12 frames per second, picks one palette for the whole clip and dithers it so gradients stay smooth.
GIFs are heavy: a 10-second clip at 480 px is often 3–8 MB, more than the WebM itself. The converter uses the first 60 seconds at most; for a shorter range, other widths or colours, use Video to GIF.
How it works
- Drop one or more WebM files: GIF is already selected. Quality, maximum resolution and sound can be changed before you start.
- Frames are decoded with WebCodecs, or FFmpeg compiled to WebAssembly, and written into a GIF in a background thread.
- Download each file, or all of them as one ZIP.
Questions
Are my videos uploaded?
No. Reading, remuxing and encoding all run in this browser tab. Open DevTools and watch the Network tab while a file converts: no request carries it.
Why is one file done in seconds and another takes minutes?
A remux only copies the streams, so it runs at disk speed. A re-encode decodes and encodes every frame; FFmpeg in WebAssembly, used when the browser can’t, is slower still.
How large can a video be?
Up to 3 GB per file for free, and as many files as you like. Remuxes and WebCodecs re-encodes stream from the disk; the FFmpeg path holds the result in memory.