Convert WebM to GIF
Convert WebM files to GIF entirely in your browser. Old-school looping animation — universal, but huge and silent (no audio, 256 colours). Drop your WebM below — vexo runs ffmpeg-wasm locally, nothing is uploaded.
Drop your video here
or choose a file from your device
Max 200 MB per file. Conversion runs in your browser.
Every conversion runs entirely in your browser. Your video never leaves your device.
About WebM → GIF
Why convert WebM to GIF?
GIF embeds anywhere — chat, email, docs, forums — and loops automatically without a player. Great for short reactions and demo clips, but expect a 5–10× larger file than the equivalent video and no audio.
About WebM
WebM was designed for the open web. VP9 typically produces 20–35% smaller files than H.264 MP4 at the same visual quality, and Opus is the best general-purpose audio codec available. Every modern browser (Chrome, Firefox, Safari 14+, Edge) plays WebM natively. vexo encodes WebM with VP9 + Opus, and falls back to VP8 + Vorbis automatically if the wasm bundle lacks VP9.
About GIF
GIF is the original looping animation format. Every browser, chat app, document editor and forum can embed it inline without a video player. The trade-off is brutal: GIFs are capped at 256 colours per frame, carry no audio, and are far larger than equivalent video. vexo extracts the trimmed range, resizes if requested, builds an optimised palette, and writes a single GIF — useful for short reactions, demo loops and email-friendly clips.
What you're converting between
A short primer on both formats so the trade-offs are obvious before you hit Convert.
WebM
SourceWebM · introduced 2010
WebM was designed for the open web. VP9 typically produces 20–35% smaller files than H.264 MP4 at the same visual quality, and Opus is the best general-purpose audio codec available. Every modern browser (Chrome, Firefox, Safari 14+, Edge) plays WebM natively. vexo encodes WebM with VP9 + Opus, and falls back to VP8 + Vorbis automatically if the wasm bundle lacks VP9.
Strengths
- Smaller files than MP4 at the same perceived quality
- Royalty-free, open codec
- Native playback in every modern browser
Trade-offs
- Older video editors (iMovie, older Premiere) may reject it
- Some social uploaders and legacy players prefer MP4
- Slower to encode than MP4 in ffmpeg-wasm
GIF
TargetGraphics Interchange Format · introduced 1987
GIF is the original looping animation format. Every browser, chat app, document editor and forum can embed it inline without a video player. The trade-off is brutal: GIFs are capped at 256 colours per frame, carry no audio, and are far larger than equivalent video. vexo extracts the trimmed range, resizes if requested, builds an optimised palette, and writes a single GIF — useful for short reactions, demo loops and email-friendly clips.
Strengths
- Embeds anywhere — chat, email, docs, forums
- Auto-loops with no player UI
- Universal — supported since the 80s
Trade-offs
- No audio, ever
- 256 colours per frame — gradients posterise
- Often 5–10× larger than the equivalent MP4 or WebM
Popular conversions
Each link below opens the converter pre-tuned for that conversion.
Supported formats
MP4 is the safest default for web and mobile playback. WebM gives the smallest files for modern browsers. GIF is for short, soundless animations.
WMV, FLV and other legacy/streaming formats are not supported in this version. Please convert those to MP4 first using a desktop tool.
| Format | Input | Output | Notes |
|---|---|---|---|
| MP4 | Yes | Yes | H.264 + AAC, broadest compatibility |
| MOV | Yes | No | Apple/QuickTime container; convert to MP4 |
| WebM | Yes | Yes | VP9 + Opus, smaller than MP4 |
| MKV | Yes | No | Container; convert to MP4 or WebM |
| AVI | Yes | No | Legacy container; convert to MP4 |
| GIF | Yes | Yes | No audio, short clips only |
| WMV | No | No | Not supported |
| FLV | No | No | Not supported |
Frequently asked questions
Your videos never leave your device
vexo is a static page. Every conversion runs inside your browser via ffmpeg compiled to WebAssembly. There is no server-side processing, no upload, no temporary file, no cache. When you close this tab, every file is gone.
- No account required.
- No server processing. Your videos stay on your device.
- No caching, no Service Worker, no IndexedDB persistence.
- The conversion engine (ffmpeg-wasm) is fetched from a public CDN and cached by the browser; no personal data is sent.