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MOV to MKV converter, without the upload.

Turn MOV videos into MKV. It is converted in your browser, so the file never leaves your device.

Drop MOV files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

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How to convert MOV to MKV

  1. Add your MOV videos

    Drop MOV (QuickTime) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. MKV is already chosen

    Press Convert. Open Options first if you want to change the defaults. The work happens in this tab and can take a while for large files.

  3. Download

    Save the MKV, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The MOV to MKV converter is part of this page and runs inside your browser. Your videos are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so work starts the moment you press Convert. How long it takes depends on your device and the size of the file.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

MOV to MKV: what to expect

MOV does not play reliably on Windows, Android, smart TVs or in many upload forms. MKV can carry several audio and subtitle tracks in one file. MOV is at home in recording and editing on Apple devices; MKV is the usual choice for films with several audio and subtitle tracks.

The defaults suit most files. Under Options you can lower the resolution, trade quality against file size, remove the sound and trim the start and end. This is demanding work for a browser: a long or high-resolution file can take several minutes, and your device does all of it, so keep the tab open.

The conversion uses your browser's own video and audio codecs (WebCodecs), with hardware acceleration where the device has it; the file is read from disk as it goes and can be up to 2 GB. Where the browser lacks a codec, the page falls back to the compatibility engine. A video over 500 MB cannot be kept at full quality in browser memory; choosing a lower resolution or quality under Options lets it fit.

MOV vs MKV

MOV

QuickTime video

MOV is Apple's QuickTime container and what iPhones and Macs record. MP4 was based on it, so the two are close relatives and often hold exactly the same video and audio streams inside.

Opens in Apple devices and video editors; Windows and Android are hit and miss

MOV converter
MKV

Matroska video

MKV is an open container that can hold practically any video and audio format plus multiple subtitle tracks. That flexibility is why it is popular for films, and why Apple devices and browsers refuse it.

Opens in VLC, Plex and many TVs; not iPhones, QuickTime or most browsers

MKV converter
MOV compared with MKV
MOVQuickTime videoMKVMatroska video
Stands forQuickTime File FormatMatroska
TypeVideo containerVideo container
CompressionLossy (or lossless with ProRes)Depends on what is inside
Usually containsH.264 or HEVC video with AAC audio; ProRes in editingAlmost anything: H.264, HEVC, AV1, several audio and subtitle tracks
Introduced1991, by Apple2002, by the Matroska project
Opens inApple devices and video editors; Windows and Android are hit and missVLC, Plex and many TVs; not iPhones, QuickTime or most browsers
Best forRecording and editing on Apple devicesFilms with several audio and subtitle tracks
File extension.mov, .qt.mkv

Questions

Are my videos uploaded anywhere?

No. The MOV to MKV conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Does converting MOV to MKV reduce quality?

It depends on what is inside the MOV. When its video and audio are already in a form MKV can hold, they can be carried over without being compressed again. Otherwise they are re-encoded, which costs a little quality. Under Options you can favour quality or a smaller file.

Can I convert several MOV files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert MOV to MKV on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MOV file, press Convert and save the MKV. There is nothing to install.

Is there a file size limit?

Yes. Files up to 2 GB are accepted, and a video over 500 MB needs a lower resolution or quality chosen under Options so the result fits in memory. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.