Video converter

Change video format or codec with FFmpeg in your browser.

Choose a videoor drop it here

MP4, MOV, WebM, MKV, AVI, or M4V

About Video converter

Video Converter changes a clip's container and video codec using FFmpeg compiled for the browser. Audio encoding follows the format you choose, and the source resolution is kept.

Runs entirely in your browser. Your files never leave your device.

How to use it

1.Add the video and note its dimensions, length, frame rate, rotation, and current audio.
2.Pick a target format and one of the video codecs it offers. The audio side is assigned for you.
3.Encode, check motion and sound at both ends, then test the file in the app it is actually for.

Options

Formats are MP4, WebM, MOV, MKV, and GIF, each showing the video codecs that work with it.
Source dimensions are kept, and audio encoding is picked for you: AAC for MP4, MOV, and MKV, Opus for WebM, none for GIF.

Limitations

Encoding in a browser is heavy work, and a long or large clip will be slower than a desktop app with hardware acceleration.
Unsupported source codecs, subtitles, chapters, HDR metadata, and extra audio tracks may not survive the trip.

Common questions

Is MP4 a codec?

No, it is a container. It usually holds H.264 or H.265 video with AAC audio, and the player has to support those too.

Why did the file get bigger?

The codec and the defaults for that format spent more data than your source was using. An efficient original can grow.

Next stepChange video bitrateAim the converted file at a size or quality target.