Convert MOV to MKV
Free MOV to MKV converter that runs entirely in your browser. No uploads, no signup required.
Drop MOV files here
or browse your device. Free, no signup required, no watermarks.
Files are processed on your device, never uploaded
Media conversions run on a full FFmpeg engine compiled to WebAssembly. The engine (~31 MB) downloads once on your first conversion, then everything runs locally.
Three steps
How to convert MOV to MKV
Add your files
Drop MOV files into the box above, or click it to browse. Add several to batch convert.
Convert
MKV is already selected as the output. Hit Convert. Your browser does the work locally.
Download
Save each converted MKV file. Pro ZIPs whole batches in one click.
QuickTime movie
MOV
MOV is Apple's QuickTime format, the default for iPhone recordings and Final Cut exports.
Matroska video
MKV
MKV is an open container that can hold any codec, multiple audio tracks, and subtitles in one file.
Why convert MOV to MKV?
MOV is Apple's QuickTime format, the default for iPhone recordings and Final Cut exports. MKV is an open container that can hold any codec, multiple audio tracks, and subtitles in one file. Converting from MOV to MKV gets you the best of the target format wherever MOV falls short, whether that's compatibility, file size, or what your apps and devices can open. With FormatFusion the switch takes seconds and your files stay on your device the whole time.
Questions
MOV to MKV: common questions
Is this MOV to MKV converter free?
Yes. It is completely free with no watermarks and no account required, for files up to 1 GB each. Convert one file or a hundred.
Is it safe to convert MOV files here?
Safer than any upload-based converter. The conversion runs locally in your browser, so your MOV files are never sent over the internet and never touch a server.
Will I lose quality converting MOV to MKV?
No. This conversion preserves your content, and MKV output keeps everything the format supports.
Can I convert multiple MOV files at once?
Yes. Free converts up to three MOV files at a time. FormatFusion Pro batches without limits and downloads whole runs as a single ZIP.
Does it work on iPhone and Android?
Yes. FormatFusion runs in any modern mobile or desktop browser. No app install needed.