# 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.

URL: https://nibbo.org/en/webm-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

1. Drop one or more WebM files: GIF is already selected. Quality, maximum resolution and sound can be changed before you start.
2. Frames are decoded with WebCodecs, or FFmpeg compiled to WebAssembly, and written into a GIF in a background thread.
3. 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.

## Related

### Convert video

- [Video converter](https://nibbo.org/en/video-converter/)
- [Convert MOV to MP4](https://nibbo.org/en/mov-to-mp4/)
- [Convert MKV to MP4](https://nibbo.org/en/mkv-to-mp4/)
- [Convert AVI to MP4](https://nibbo.org/en/avi-to-mp4/)
- [Convert WebM to MP4](https://nibbo.org/en/webm-to-mp4/)
- [Convert WMV to MP4](https://nibbo.org/en/wmv-to-mp4/)
- [Convert FLV to MP4](https://nibbo.org/en/flv-to-mp4/)
- [Convert 3GP to MP4](https://nibbo.org/en/3gp-to-mp4/)
- [Convert M4V to MP4](https://nibbo.org/en/m4v-to-mp4/)
- [Convert MTS to MP4](https://nibbo.org/en/mts-to-mp4/)
- [Convert MP4 to WebM](https://nibbo.org/en/mp4-to-webm/)
- [Convert MOV to WebM](https://nibbo.org/en/mov-to-webm/)
- [Convert MOV to GIF](https://nibbo.org/en/mov-to-gif/)
- [Convert MOV to MP3](https://nibbo.org/en/mov-to-mp3/)
- [Convert WebM to MP3](https://nibbo.org/en/webm-to-mp3/)
- [Convert MKV to MP3](https://nibbo.org/en/mkv-to-mp3/)
- [Convert AVI to MP3](https://nibbo.org/en/avi-to-mp3/)
- [MP4 to MP3](https://nibbo.org/en/mp4-to-mp3/)

### Compress video

- [Compress video to a target size](https://nibbo.org/en/compress-video/)
- [Compress WebM video](https://nibbo.org/en/compress-webm/)

### More tools

- [Compress image to an exact size](https://nibbo.org/en/compress-image/)
- [Compress PDF](https://nibbo.org/en/compress-pdf/)
- [Audio converter](https://nibbo.org/en/audio-converter/)