Are my videos uploaded to a server?
No. Conversion, compression, subtitles, and transcription all run inside your browser using built-in media APIs, so files never leave your device.
Video Converter
About this tool
Video Converter
Convert videos between WebM and MP4 privately in your browser with resolution and quality controls.
Features
- Output format controls.
- Resolution controls.
- Quality controls.
- Browser media processing controls.
Frequently asked questions
Why does converting take about as long as the video?
The browser re-encodes by playing the video through a capture pipeline in real time. A two-minute clip takes roughly two minutes to process.
Which browsers work best?
Chrome and Edge support every feature, including MP4 output and live transcription. Firefox and Safari support WebM output and the subtitle editor.