Video to MP4 Converter

Convert MOV, WebM, MKV, AVI and other videos to MP4 that plays everywhere.

Runs in your browser. Your files never leave your device. See how to check

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How to do it

1
Choose your settings
Fill in the details or pick the options you need.
2
See the result
The preview updates right away as you change things.
3
Download or save it
Save the result to your device. Nothing is sent to or stored on a server.

About this tool

Add a video in MOV (iPhone), WebM (screen recordings), MKV, AVI or another format and get an MP4 that works on every phone, computer and website. The conversion runs inside your browser with a WebAssembly build of FFmpeg, so the file is not uploaded and there is no account or watermark.

How it works

Your browser loads the FFmpeg engine from this site, reads the file from your device and writes the result back to your device. Processing happens on your own processor, so speed depends on your computer or phone and on the length of the file. Short clips finish in seconds; a one hour video can take several minutes.

Quality and size

Higher quality means a larger file. For speech, 96 to 128 kbps is plenty; for music choose 192 kbps or more. For video, the balanced setting is a good start, and you can lower the maximum width to get a much smaller file for chat apps.

Limits

Browsers have limited memory, so files above about 400 MB are not accepted here. If a file fails, try a shorter clip or another format. Some rare codecs are not supported.

Privacy

Because nothing is uploaded, private recordings, family videos and meetings stay on your device. Close the tab and the data is gone.

Tips for best results

Take a moment to read the options before you start, and try the tool with a small sample first. Everything runs in your browser on your own device, so nothing you type or add is uploaded, and closing the tab clears it. If something does not look right, reload the page and try again, or use the report link on this page to tell us what went wrong so we can fix it. If a result still looks wrong, change one value at a time to see which box matters most. Bookmark this page if you will need the tool again.