Video Format Converter
Re-encode any video into 9+ common formats (MP4, MOV, AVI, MKV, MPEG, FLV, 3GP, WebM) or extract MP3 audio — fully local with ffmpeg.wasm.
Drop files here or click to browse
Your files never leave this device
How to use the Video Format Converter
- Upload a video
- Pick the target format, resolution and quality
- Click Convert — first run downloads the ~30 MB engine
- Download the converted file
Features
- ✅ Formats: MP4, WebM (VP9/VP8), MOV, AVI, MKV, MPEG-2, FLV, 3GP, MP3
- ✅ Optional resolution scaling while converting
- ✅ Quality selector (Best / Balanced / Smaller file)
- ✅ Keep or drop the audio track
- ✅ Easy “Another video” reset button
FAQ
Why does the first run take a moment?
The converter bundles real ffmpeg running in your browser (ffmpeg.wasm); the ~25 MB engine is included with the site, loads once, and stays fully local.
Is conversion lossy?
Video conversion re-encodes, so small quality loss is normal; use Best quality for archival.