Convert an animated GIF into a WebM video - locally in your browser, no upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
WebM is the open web's own native video format - smaller than GIF, losslessly embeddable via the HTML `<video>` tag and free of licensing costs (VP9/Opus instead of patent-encumbered codecs). For a webpage that wants to replace a GIF animation without touching the actual image workflow, WebM is often the better choice over MP4.
For the conversion, every single GIF frame is drawn onto a canvas and encoded from there to VP9/AV1 via your browser's WebCodecs interface - the GIF's original per-frame delay decides how long each video frame stays on screen in the WebM, so the animation's pace and timing stay untouched. If your browser lacks a matching hardware encoder, the tool stops the conversion with a clear, honest message instead of shipping a broken file.
The whole processing happens directly in your browser tab, via the self-hosted mediabunny library (MPL-2.0, no third-party CDN) - your animated graphic never leaves your device at any point.
| Input formats | GIF |
|---|---|
| Auto-conversion | PNG, JPG, WebP, BMP, TIFF, ICO, SVG, HEIC |
| Output format | WebM |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: If no matching hardware video encoder is present, the conversion stops with an honest message instead of shipping an unusable result. The same intake limits as the GIF-optimize tool apply on import: up to 1000 individual frames, at most 100 MB per file. Because GIF carries no sound to begin with, the resulting WebM has no audio track either.
No, the conversion happens entirely in your browser tab's own memory - nothing is sent to a server.
WebM (VP9/Opus) is free of licensing costs and often more compact than MP4 - a good choice for the open web. For maximum device compatibility, there is the sibling tool "GIF to MP4".
Yes, every GIF frame is encoded as a video frame with exactly the GIF's own delay.
No, GIF itself has no audio track, so the WebM has none either.
In virtually every modern browser, yes - for older software with MP4-only support, there is the sibling tool "GIF to MP4".