MOV to MKV Converter – Free Online

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How to Convert MOV to MKV Online

Upload your MOV file

Drag and drop your .mov file onto the page or click to browse. You can select several MOV files at once to batch-convert them.

MKV is preselected

The output format is already set to MKV, so you can convert immediately. If you need to, adjust the codec, resolution, frame rate or bitrate in the settings panel first.

Convert and download

Click Convert. The MKV file is processed on your own device; nothing is uploaded to a server. When it finishes, click Download to save it (or Download all to get a batch as a ZIP).

Why Convert MOV to MKV?

Matroska is the preferred container for Plex, Jellyfin and Kodi libraries because it supports chapters, several subtitle tracks and any codec. Converting MOV to MKV moves your QuickTime footage into that flexible container.

The video is re-encoded with the source codec and bitrate kept by default, so a full-length MOV comes out looking the same; conversion time depends on its length and resolution.

Private by design: your MOV file is converted on your own device and never uploaded.
MKV preselected: the output format is already chosen, so it is a one-click conversion.
Batch friendly: convert several MOV files in one go and download them as a ZIP.
No limits, no watermark: free for files of any size, with nothing stamped on the output.

MOV vs MKV

MOV (QuickTime File Format): MOV is Apple's QuickTime container. iPhones, iPads and Final Cut Pro record and export MOV natively, and it can hold high-quality H.264, HEVC or ProRes streams. It is best for Apple devices, iMovie and Final Cut Pro workflows.

MKV (Matroska Video): MKV (Matroska) is an open container that can hold practically any codec plus multiple audio tracks, subtitle tracks and chapters, which makes it popular for archiving films and TV episodes. It is best for archiving, multi-language releases and media servers.

In short: keep MOV when the priority is Apple devices, iMovie and Final Cut Pro workflows, and switch to MKV when the file is headed for archiving, multi-language releases and media servers. Need a different target? The full Video Converter supports every format listed below.

MOV to MKV FAQ

Is MOV to MKV lossless?

Not bit-for-bit: the video is re-encoded, but with the source codec and bitrate kept the MKV is visually identical to the MOV.

Will Plex play the MKV directly?

Yes. Plex, Jellyfin and Kodi play MKV with H.264/HEVC natively, and most clients direct-play it without transcoding.

Is this MOV to MKV converter free?

Yes. Converting MOV to MKV on MediaConverter.io is completely free, with no watermark, no sign-up and no daily conversion limit.

Are my MOV files uploaded to a server?

No. The converter runs inside your browser using WebAssembly and WebCodecs, so your .mov file is read and converted on your own device. Nothing is uploaded, which keeps private recordings private and means there is no waiting in an upload queue.

Is there a file size limit for MOV to MKV?

No fixed limit. Because processing happens locally, the practical limit is your computer's memory and patience; multi-gigabyte MOV files convert fine on a desktop browser. Very large files take longer on phones.

Will converting MOV to MKV reduce quality?

The video is re-encoded into MKV. Keep the source codec, resolution and bitrate (the defaults) and the result is visually the same as your MOV; lowering the bitrate or resolution is what reduces quality, and you control that trade-off in the settings panel.

Which browsers support the MOV to MKV converter?

Current versions of Chrome, Edge, Firefox and Safari on desktop all work. Chrome and Edge are fastest because they expose hardware-accelerated WebCodecs decoders.