Does my video get uploaded anywhere?

No. Everything runs in your browser with WebCodecs. Your video is never sent to a server and nothing leaves your device.

Which formats can I convert between?

Drop almost any video and export to MP4 or MOV (H.264), MKV (H.264), or WEBM (VP9 plus Opus). MP4 is the safest pick for phones, TVs, and editors.

Why does conversion take a moment?

When the source codec differs from the target, the video gets decoded and re-encoded frame by frame. Longer or higher-resolution clips take proportionally longer.

Video Converter

Pick MP4, MOV, WEBM, or MKV as the target and convert in one step. Your files never leave the browser.

What this does

Convert video between MP4, MOV, WEBM, and MKV. Pick a target format and convert in one step, entirely in your browser with WebCodecs, so your files never leave your device.

How it works

1Drop your video or pick it from your device.
2Choose a target format (MP4, MOV, WEBM, or MKV) and click Convert.
3Download the converted video. It never leaves your browser.

Built with open source

Mediabunny — Converts and edits video and audio in the browser via WebCodecs. Add-on encoders cover MP3, AAC, and FLAC. · MPL-2.0

Frequently asked questions

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