About this tool
Turn a phone video, screen recording or download into the format you need: MP4 for WhatsApp, Instagram and almost every player, WebM for the web, MOV for Apple editing apps or MKV to keep several tracks. Choose the file, pick the format and download the result. The conversion runs inside your browser with its own video engine (WebCodecs), so the video never leaves your device, there is no upload queue or size cap from a server, and private recordings stay private. When the codecs already fit the new container, the tracks are copied without re-encoding, which is fast and keeps the original quality.
How to use it
- 1 Choose or drop a video (MP4, MOV, WebM, MKV and more).
- 2 Check the duration, resolution and tracks that appear.
- 3 Pick the output format: MP4, WebM, MOV or MKV.
- 4 Tap 'Convert and download' and wait for the progress bar.
Frequently asked questions
Is my video uploaded?
No. The video is read and converted by your browser; it never leaves your device.
Which format should I choose?
MP4 plays almost everywhere, including WhatsApp and Instagram. WebM is lighter for websites, MOV suits Apple apps and MKV keeps several audio or subtitle tracks.
Why is it slow on some videos?
When the codec has to change, every frame is re-encoded by your device. Long or 4K videos take longer on phones; a computer is faster.
Which browsers work?
Recent Chrome, Edge, Safari and Firefox. Very old browsers have no video engine for web pages.
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