Convert MP4 to MP3, MOV to GIF, and compress videos 100% privately in your browser using ffmpeg.wasm — no server upload.

How to Convert Video Locally in Your Browser

Why local video conversion?

Uploading a 2GB video to a server is slow and leaks private content. Our Video tab runs FFmpeg compiled to WebAssembly. Your video never leaves your device.

MP4 to MP3 in 3 clicks

1. Select Video tab, drop MP4. 2. Choose MP3 output, bitrate 192kbps. 3. Download. Works for MOV, MKV, WebM too. Same for MP4 to WAV for editing.

Compress without quality loss

Use H.264 preset, lower CRF to 28 for 60% smaller file, keep 1080p. For web, convert to WebM VP9 — 40% smaller than MP4.

Privacy advantage

Wedding videos, work recordings — they stay on your laptop. No cloud copy. This is why journalists and creators prefer local tools.