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ConvertAnyVideo

WMV to MKV Converter

Convert WMV videos to MKV in seconds. Change resolution, quality and frame rate if you like — all in your browser.

or drop files here

Up to 1 GB per file · Files never leave your device

  • 100% free
  • No sign-up
  • No upload — private
  • No watermark

How to convert WMV to MKV

  1. Add your WMV files

    Click “Choose Files” or drag and drop your WMV videos onto this page.

  2. MKV is selected

    The output is already set to MKV. Open Advanced settings if you want to change the quality, resolution or length.

  3. Convert and download

    Click Convert. Your MKV file is ready in moments — nothing is uploaded.

About the formats

WMV

Windows Media Video

WMV is Microsoft’s Windows Media Video format, made for Windows Media Player and older Windows PCs.

MKV

Matroska Video

MKV (Matroska) is a flexible open container that can hold several audio tracks, subtitles and chapters in one file. It is popular for movies and series.

Frequently asked questions

How do I convert WMV to MKV?

Click “Choose Files” and select your WMV file (or drag it onto the page). MKV is already selected as the output, so just click Convert and download your MKV file when it’s ready.

Will I lose quality converting WMV to MKV?

When the video inside your WMV file is compatible with MKV, it is copied without re-encoding, so there is no quality loss at all. Otherwise it is re-encoded at high quality. You can pick the quality yourself in Advanced settings.

Is it safe to convert WMV files here?

Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.

Is the WMV to MKV converter free?

Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.

Can I convert several WMV files at once?

Yes. Add as many WMV files as you like and convert them in one go, then download them one by one or together as a ZIP file.

Convert WMV to other formats

Convert other formats to MKV