How to convert Windows Media (WMV) to Matroska (MKV)
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert Windows Media (WMV) to Matroska (MKV)
NexMedia converts Windows Media (WMV) to Matroska (MKV) on its own servers. Processing time depends on the file size and how busy the queue is.
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Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Windows Media (WMV)
Windows Media Video (WMV) is Microsoft's family of video codecs, stored in the ASF container.
Older Windows software, Windows Movie Maker projects and video from the 2000s.
WMV files can carry DRM, and many devices outside Windows do not play WMV.
Convert WMV to MKV online free, no account required — MKV is a flexible open container for video with any number of audio and subtitle tracks.
Change WMV to MKV without losing quality — convert WMV to MKV free in your browser.
Why does my WMV video refuse to play on my Mac or iPhone? Windows Media Video uses Microsoft codecs that Apple and Android devices don't include, so a conversion to MP4 is the quickest fix.
About Matroska (MKV)
Matroska (MKV) is an open container format that can hold almost any video and audio codec, any number of audio and subtitle tracks, chapters and attachments.
It is popular for films and series with several audio languages and subtitle tracks, and for archiving video.
Many phones, browsers and TVs do not play MKV files directly, even when they support the codecs inside.
Why convert video to MKV? When one file must carry several audio languages, subtitle tracks and chapters, no container holds them as flexibly.
What changes when you convert WMV to MKV
- The WMV is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
- WMV files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert WMV to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted MKV file is kept for 2 hours, then deleted.
WMV to MKV: questions and answers
Does converting WMV to MKV reduce quality?
The WMV is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
What is the difference between WMV and MKV?
WMV is Microsoft's Windows Media video format. MKV is a flexible open container for video with any number of audio and subtitle tracks.
Can I change the settings when converting WMV to MKV?
Before you convert WMV to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Do I need an account to convert WMV to MKV?
No. You can convert WMV to MKV without an account; signing in raises the file-size and daily limits.
How long is my converted MKV file kept?
The MKV file you convert from WMV is kept for 2 hours, then deleted automatically.
What happens if my WMV file is copy-protected?
WMV files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
When I convert WMV to MKV, is the video re-encoded?
The WMV is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.