Convert Waveform Audio (.wav) to Matroska Video (.mkv) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .wav 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.
WAV delivers uncompressed PCM audio at roughly 10 MB per minute for CD-quality stereo. MKV (Matroska Video) is an open-source multimedia container developed by the Matroska project, capable of holding virtually any combination of audio, video, subtitle, and metadata streams in a single file. While MKV is primarily associated with video, it is a powerful audio container that supports every major audio codec.
Converting WAV to MKV wraps the audio (typically re-encoded to a compressed codec, or muxed as raw PCM) inside a Matroska container. This is most commonly needed when combining audio with video streams in MKV-based production workflows, or when the MKV container's rich feature set (chapters, multiple audio tracks, metadata) is required.
MKV's primary advantage is its ability to contain multiple audio tracks alongside video, subtitles, and chapter markers in a single file. Converting WAV audio to MKV is the first step in building a complete MKV media file — you might combine your WAV-derived audio track with a video stream and multiple subtitle tracks later.
MKV also supports virtually every audio codec (FLAC, AAC, Opus, Vorbis, AC3, DTS, PCM) within the same container format. This flexibility means you can store your WAV audio as lossless FLAC within MKV, or as compressed AAC, depending on your needs. Media server software like Plex, Jellyfin, and Kodi natively supports MKV.
FFmpeg reads the WAV PCM data and can either mux it directly as PCM within MKV (-c:a copy or -c:a pcm_s16le) or transcode to a compressed codec like FLAC (-c:a flac), AAC (-c:a aac), or Opus (-c:a libopus). The Matroska container uses EBML (Extensible Binary Meta Language) to structure the file, with Cluster elements containing the audio blocks. MKV supports both constant and variable bitrate audio, and the container's seeking capabilities work well with all codec types.
If the WAV audio is muxed as raw PCM into MKV, quality is identical to the source — no encoding occurs. If transcoded to FLAC within MKV, quality is mathematically lossless. If transcoded to AAC or Opus, quality depends on the bitrate chosen but both codecs deliver excellent results at moderate bitrates. The MKV container itself introduces zero quality impact — it is simply a wrapper around the audio data.
| Device | WAV | MKV |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
WAV to MKV is a container conversion that leverages Matroska's rich feature set. Choose the appropriate audio codec within MKV based on your quality and size requirements.
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| No |
| Funktion | WAV | MKV |
|---|---|---|
| Fullstandigt namn | Waveform Audio File Format | Matroska Video |
| Filandelse | .wav | .mkv |
| Bast for | Lossless quality | Multiple audio tracks |