🎬 WebM to MP4 Converter

Convert WebM videos to MP4 entirely in your browser. Files never leave your device — no upload, fully private.

🎞️

Click or drag & drop a WebM video here

.webm files · recommended under 50MB / 1080p

• Conversion runs locally via ffmpeg.wasm — your video is never uploaded to any server.

• The first conversion downloads the converter engine (~25MB), so it may take a moment.

• Browser-based encoding is slower than a desktop app; a 50MB clip may take several minutes.

• For very large or 4K videos, a desktop tool or a server-side converter will be much faster.