Convert a video to MP4, MOV, WebM or MKV
Move a clip between MP4, MOV, MKV and WebM. Your browser opens the file from your disk and writes the new one back to you — there is no server in the middle.
How to convert a video in three steps
Choose your video
Drag it onto the page or browse from your desktop or phone. Most common video formats are accepted.
Pick a format and settings
Choose a target format, and adjust the resolution or the profile if you need to. Nothing is written until you press the button.
Save the new file
Your browser saves the converted video straight to your device. The original stays exactly where it was.
What happens to your file
It never leaves the tab
Converting a video usually means sending it to somebody else's computer and getting a new one back. Here the work happens in the page you are already looking at. Your browser opens the file, the tool rewrites it, and the browser hands you the result.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so no file is ever attached to an identity.
- Nothing is recorded about what you converted.
Why not an upload site
An upload-based converter is a form that posts your video to someone else's machine. Take that step out and a lot of small annoyances disappear with it.
A typical upload site
This tool
Formats & limits
- Input formats
- MP4, MOV, MKV, WebM, AVI and more
- Output formats
- MP4, MOV, MKV, WebM, AVI, M4V, WMV, FLV, TS, 3GP
- Maximum file size
- Set by your device, not by a plan
- Files per run
- One at a time
- Sign-up required
- None
A note on quality
When the target format can hold the video and audio exactly as they are, the tool copies them across without re-encoding, so nothing is lost. When it cannot, the profile you choose decides how much is re-encoded. The Smart profile makes that call for you.
Questions
Are my videos uploaded anywhere?
No. Your browser reads the video from your disk and the tool works on it in the same tab. You can watch this yourself: open your browser's network panel before you drop a file and see it stay quiet.
Is there a file size limit?
Not one we set. What you can convert depends on your own device and how much room your browser has to work in. Very large video is easier on a desktop than a phone.
Will converting reduce the quality?
Not if it can be avoided. The Smart profile copies the video and audio across unchanged whenever the target format allows it, and only re-encodes when there is no other way.
Do I need to install anything?
No. It works out of the box in current versions of Chrome, Safari, Firefox and Edge, on desktop and on modern phones.