Video Converter

Convert videos between MP4, WebM, MOV, and AVI in your browser using FFmpeg WebAssembly. No server uploads.

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MP4
MOV
WEBM
AVI

🔒 100% Local Processing — Video transcoding executed entirely in your browser WebAssembly sandbox. Nothing is ever uploaded.

Convert videos between MP4, WebM, MOV, and AVI in your browser using FFmpeg WebAssembly. No server uploads.

Drag and drop your mp4, mov, webm, or avi videos here

One file to begin. It is handled for this request and not retained.

How to use this tool

Upload an MP4, WebM, MOV, or AVI video into the conversion workspace.
Preview the original video playback to ensure it loaded properly.
Select your target container format: MP4 (universal), WebM (HTML5 web), MOV (Apple), or AVI (multimedia).
Click Convert Video to start client-side transcoding.
Preview and download the converted video file directly to your disk.

Frequently asked questions

Quick answers about file privacy, processing modes, formats, and device support.

You can convert between MP4, WebM (VP9/Vorbis), MOV (QuickTime), and AVI. All conversions are performed with compatible codecs for cross-platform playback.

Because transcoding is processed in memory on your computer, we recommend video clips up to 500 MB for optimal browser responsiveness.

Elixuvo uses standard visual presets (H.264 CRF 24 for MP4/MOV and VP9 CRF 30 for WebM), ensuring sharp video clarity while optimizing container compatibility.

Completely. The entire conversion pipeline operates inside an isolated WebAssembly sandbox in your browser. Nothing is ever sent across the network.

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Merge multiple video clips into a single video directly in your browser using FFmpeg WebAssembly. Reorder clips, preview files, and join MP4, MKV, MOV, and WebM seamlessly with zero server uploads.