Convert WMA to MKV — Free Online Converter
Convert Windows Media Audio (.wma) to Matroska Video (.mkv) online for free. Fast, secure audio conversion with no watermarks or registration....
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Upload your .wma file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
About WMA to MKV Conversion
WMA is Microsoft's audio codec within the ASF container. MKV (Matroska Video) is an open-source multimedia container that supports virtually every audio and video codec ever created. Developed by the Matroska project, MKV is the preferred container for media archiving, home video libraries, and media server software like Plex, Jellyfin, and Kodi.
Converting WMA to MKV wraps the audio inside a Matroska container, typically for integration with video production workflows, media server libraries, or to leverage MKV's superior feature set (chapters, multiple tracks, rich metadata).
Why Convert WMA to MKV?
MKV is the standard container for media server software and personal media libraries. Converting WMA audio to MKV prepares it for muxing with video streams, adding subtitle tracks, or building multi-track audio files within the Matroska ecosystem.
MKV supports virtually every audio codec (FLAC, AAC, Opus, Vorbis, AC3, DTS, PCM, and even WMA itself), multiple concurrent audio tracks, chapter markers, and extensive metadata. This flexibility makes MKV superior to ASF for media management and distribution.
Common Use Cases
- Preparing WMA audio tracks for muxing with video in MKV production workflows
- Building multi-language audio files with WMA as one of several tracks
- Converting WMA for media server integration with Plex, Jellyfin, or Kodi
- Creating MKV audio files with chapter markers for audiobooks and lectures
- Archiving WMA audio in a more flexible open-source container format
How It Works
FFmpeg reads the WMA stream from its ASF container and remuxes or transcodes it into an MKV container. The audio can be stored as-is (WMA in MKV, if the player supports it), transcoded to FLAC for lossless, or encoded to AAC/Opus for efficient compression. MKV's EBML structure supports multiple audio tracks, chapter definitions, and attachments (album art, lyrics). The Matroska container adds negligible overhead.
Quality & Performance
When remuxing WMA directly into MKV (-c:a copy), quality is identical to the source. When transcoding to another codec (FLAC, AAC, Opus), quality depends on the target codec and settings. Transcoding to FLAC preserves the full decoded quality losslessly. The MKV container introduces zero quality impact.
Device Compatibility
| Device | WMA | MKV |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Tips for Best Results
- 1Use FLAC as the audio codec within MKV for lossless archiving of WMA content
- 2Add chapter markers for long-form content like audiobooks or lecture recordings
- 3Use .mka extension for audio-only files to follow Matroska naming conventions
- 4Transcode to Opus within MKV for the most efficient compressed audio if lossless is not needed
- 5Verify playback in your target media player — MKV with WMA audio may not be universally supported
Related Conversions
WMA to MKV conversion leverages Matroska's open-source flexibility for media management. Choose the appropriate audio codec within MKV based on your quality and compatibility requirements.