MOV to MKV Converter

Repackage a MOV into MKV, the open container that holds video, several audio tracks, and subtitles. Free, in your browser, no signup.

Select MOV file →

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We support most file types including: MP4, MOV, WEBM, AVI, MP3, WAV, PNG, JPEG, GIF, MKV, PDF, FLAC, TIFF!

EchoWave is used by creators, marketers, educators, and businesses to convert and edit media online.

Updated June 2026

MKV is an open container that can hold almost any codec along with several audio tracks and subtitle tracks, which makes it popular for media servers like Plex and for archiving. Converting your MOV to MKV in EchoWave repackages the same video and sound into that flexible container, free and in your browser. When the codecs already fit MKV, the change can happen without re-encoding, so the picture stays identical.

Free, no sign-upNo account, no trial

Runs in your browserNothing to install

Works on every devicePhone, tablet, laptop

No watermarkClean output, every time

How it works

How to convert MOV to MKV

1
Upload your MOV
Drag your MOV onto the converter or pick it from your device. Nothing to install.
2
Choose MKV and convert
Select MKV as the output and start. Free, with no sign-up and no watermark.
3
Download your MKV
Save the finished MKV, or open it in the editor to trim, crop, or resize it first.

Try it

Estimate your MKV

Pick a video bitrate and a length to see the MKV file size before you convert.

Video bitrate

Length5 min

1 min30 min

Estimated MKV size183MBSharp 1080p

An estimate. Real size varies with resolution, frame rate, and how much the picture moves.

The formats

MOV vs MKV

MOV

QuickTime File Format

Apple QuickTime video, common on iPhone and Mac

Type: Video container (QuickTime)
Holds: H.264 or HEVC video with AAC audio
Typical size: Large, often bigger than MP4
Plays on: iPhone, Mac, QuickTime, most modern players

Best for:Recording and editing on Apple devices

MKV

Matroska Video

An open container that holds almost anything

Type: Open video container
Holds: Almost any codec, plus several audio and subtitle tracks
Typical size: Large, depends on the codec inside
Plays on: VLC and most modern players, less on default phone apps

Best for:Movies with multiple audio tracks and subtitles

Will it lose quality?

When the codecs already match MKV, the converter can change the container without re-encoding, so the picture stays identical.
When the video has to be re-encoded for MKV, a high bitrate keeps it visually close to the MOV.
Converting cannot add detail the MOV never had. The output is at best as good as the source.

Use cases

What people use it for

Play anywhereMake a clip your device supports

Video editorsGet footage your software accepts

Web videoUse a format browsers play

CourseworkHand in a standard video file

SharingSend a clip people can open

Troubleshooting

If something looks off

The MKV will not play

Some players are picky about codecs. Try it in VLC, which opens almost anything, or convert again and let the converter re-encode the video.

The file got larger

A format change can shift the size, and re-encoding at a high bitrate adds overhead. Lower the bitrate or trim the clip for a smaller file.

Audio and video drift out of sync

Re-download the source and convert again. If a long recording drifts, splitting it into shorter pieces usually fixes the sync.

FAQ

MOV to MKV questions

How do I convert a MOV to MKV?

Upload your MOV, choose MKV as the output, and start. When it finishes, download the MKV or open it in the editor to trim or adjust it first.

Why convert MOV to MKV?

MKV is an open container built to carry one video stream alongside multiple audio tracks and subtitle tracks in a single file. It is a common choice for home media servers like Plex and for keeping a tidy archive, which is harder to do in a MOV.

Is converting MOV to MKV lossless?

It can be. MKV accepts the H.264 and HEVC video that MOV files usually carry, so when the codecs already fit, the container changes without re-encoding and the picture and sound stay identical. If a re-encode is needed, a high bitrate keeps the result close to the source.

Does MKV keep multiple audio tracks and subtitles?

Yes. MKV is designed to hold several audio tracks and selectable subtitle tracks in one file. Any extra tracks already present in your MOV are carried across, and MKV can take added subtitles later in a tool like MKVToolNix.

After converting MOV to MKV, what plays the file?

VLC plays MKV out of the box, and most modern media players and TVs handle it too. Default phone apps and some web tools are less reliable, so convert to MP4 instead if you mainly need the clip on mobile or for upload.

Is the MOV to MKV converter free?

Yes. EchoWave converts MOV to MKV with no signup, no file-count limit, no trial, and no watermark. Upload your video, convert it, and download the MKV from your browser.

Does the MOV to MKV converter work on Mac, Windows, iPhone, and Android?

Yes. You can repackage a MOV into MKV from a browser on macOS, Windows, Chromebook, or Linux, and even kick it off from a QuickTime recording on iPhone, iPad, or Android with nothing to install. The MKV that comes back is aimed at media servers like Plex and at desktop players such as VLC, so that is where you will open it once it downloads.

Can I convert a large MOV file?

Yes. There are no file-count limits on these pages, and large MOV files are supported. They simply take a little longer to upload and convert.