MOV to MKV Converter

Convert MOV to MKV Online

MOV is Apple's QuickTime container (released 1991, later the basis for MP4); MKV (Matroska) is the open, royalty-free container built to hold unlimited video, audio, and subtitle tracks plus chapters in one file. This tool rewraps your MOV into MKV so a single file can carry multiple audio languages, soft subtitles, and chapter markers for Plex, Kodi, and VLC libraries. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

How to Convert MOV to MKV

1. Upload Your MOV File: Drag and drop or click "+ Add Files" to load one or more MOV files from your device. Batch upload is supported, and each file is processed with the same settings.
2. Pick a Video Codec and Audio Codec (Optional): Leave Video Codec and Audio Codec at their defaults to keep the source streams (H.264, HEVC, AAC, and similar copy straight into MKV without re-encoding), or choose H.265, AV1, VP9, FLAC, or Opus if you want to transcode.
3. Set File Compression or Resolution (Optional): Use File Compression with Specific file size, Constant Bitrate, or CRF (Constant Quality), and adjust Video resolution or Trim only if you need to shrink or shorten the file. Skip this section for a lossless rewrap.
4. Convert and Download: Click "Convert" and download your MKV. No sign-up, no watermark.

MOV vs MKV — What Changes When You Convert

A container is an envelope, not a codec — neither MOV nor MKV alters quality on its own. What differs is what the envelope can carry and where it plays.

Need the reverse direction or a more universal file? See MKV to MOV to go back to QuickTime, or MOV to MP4 for the widest device compatibility.

Frequently Asked Questions

Does converting MOV to MKV reduce quality?

Not if you keep the default codecs. With Video Codec and Audio Codec left as-is, the existing H.264/HEVC video and AAC audio streams are copied straight into the Matroska container — a lossless rewrap (remux) that changes the wrapper, not the pixels. Quality only changes if you switch to a different codec or apply File Compression, both of which re-encode the stream.

Will the MKV keep my multiple audio tracks and subtitles?

Yes — preserving extra tracks is the main reason to use MKV. Matroska natively carries an unlimited number of audio tracks (for example, multiple languages or a commentary track) plus soft subtitle tracks in a single file, which MOV only partially supports. Embedded tracks present in the source MOV are carried into the MKV.

What plays MKV files?

VLC, Kodi, MPV, Plex, and PotPlayer play MKV across Windows, macOS, and Linux, and Windows 10 and 11 open MKV natively through the built-in Media Player / Films & TV app. Playback still depends on the codec inside — a player that lacks an HEVC or AV1 decoder will struggle regardless of the container. MKV support on smart TVs is common but model-dependent; convert to MP4 if a specific TV refuses the file.

Is the MKV larger than the MOV?

For a straight rewrap the size is essentially the same — the audio and video data are identical, and only a few kilobytes of container overhead differ. In our testing, remuxing a MOV to MKV with default (copy) codecs finished in seconds and produced a file within roughly 1% of the source size. The file only grows or shrinks if you re-encode to a different codec or change the bitrate, resolution, or trim length under File Compression.

Is anything stored on your servers after conversion?

Your file is uploaded over an encrypted (TLS) connection, converted on our servers, and deleted automatically after a few hours. No account is required, and there are no watermarks or file-count limits. The practical limit on very large MKV rips is upload time over your own connection, not a device memory ceiling.