Convert MOV to MKV
Choose your MOV file and get a MKV file in seconds. Nothing leaves your device.
Converter
- FilesOne or many, images and videos mixed
- FolderEvery matching file inside, subfolders included
- ArchiveZIP, RAR, 7z or TAR: convert the contents or the archive itself
Drop files, folders or archives here
Unsupported files are skipped. Nothing is uploaded.
Everything runs in your browser. Files are not uploaded.
About this conversion
Only the container and encoding change; picture and sound are re-encoded in your browser.
Good to know
Recompressing a lossy file costs a little more quality.
The video is re-encoded, which takes time depending on length and device.
The audio track is kept unless you switch it off.
How it works
Your browser can use hardware-accelerated video encoding for this conversion, which is much faster than software.
This conversion uses ffmpeg compiled to WebAssembly. It is loaded only when needed and runs in a background thread.
Your browser can
- Built-in image codecs
- Hardware video (WebCodecs)
- Multiple threads
- Create AVIF natively
If something is missing, the conversion takes a little longer but still works.
About MOV (QuickTime Movie)
MOV is Apple's QuickTime container, common for iPhone and professional camera recordings.
- iPhone videos
- Video editing
- Camera footage
About MKV (Matroska Video)
MKV is a flexible open container that holds any number of video, audio and subtitle tracks.
- Holds many audio and subtitle tracks
- Open standard
- Supports nearly any codec
Related conversions
Frequently asked questions
Are my files uploaded to a server?
No. The conversion runs entirely in your browser with local code. Your files never leave your device, and there is no upload.
Is there a file size limit?
There is no limit on our side, but your browser memory is. Images work for very large files; for videos, files above a few hundred megabytes can fail on devices with little memory.
Will the quality suffer?
That depends on the target format and settings. Use the quality option to balance size and detail; lossless targets keep everything the source contained.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari. Fast hardware paths are used where available, with a compatible fallback otherwise.