This free online WMA to MKV converter lets you change wma audio files into mkv video format right inside your web browser. There is nothing to install, no account to create and no watermark added to your result.
Unlike most converters, EverythingConverter never uploads your files to a server. The entire WMA to MKV conversion happens locally on your own device, which means your documents and media stay completely private and the process works even on slow connections.
How to convert WMA to MKV
- Click the upload area above or drag and drop your WMA file into it. You can also browse and pick a file from your device.
- EverythingConverter reads the file directly in your browser and starts to convert it to MKV automatically. Nothing is sent to any server.
- When the conversion finishes, your new MKV file downloads right away. You can convert another file at any time, completely free.
WMA and MKV explained
What is a WMA file?
WMA (Windows Media Audio) is a lossy audio format created by Microsoft. It was common on older Windows systems, so converting it to MP3 or another modern format improves compatibility.
What is a MKV file?
MKV (Matroska) is a flexible open container that can hold video, multiple audio tracks and subtitles in one file. It is popular for high quality movies and archived video.
Convert WMA to MKV on any device
You can convert WMA to MKV on Windows, Mac, Linux, Chromebook, Android and iPhone, straight from Chrome, Safari, Edge or Firefox. There is no app to install and no account to create. Because the conversion runs on your own device, it also works offline once the page has loaded, and you can convert as many files as you want.
Frequently asked questions
How do I convert WMA to MKV for free?
Upload your WMA file to the converter above and it will be turned into a MKV file automatically. The tool is completely free, with no limits on how many files you can convert and no watermark on the result.
Is it safe to convert WMA to MKV here?
Yes. EverythingConverter converts your WMA file entirely inside your browser. Your file is never uploaded to a server, so no one but you ever has access to it. This makes it one of the most private ways to convert WMA to MKV online.
Can I convert multiple WMA files at once?
Yes. You can drop or select as many WMA files as you like and they are all converted to MKV in one batch, then bundled into a single ZIP download. It is the fastest way to bulk convert WMA to MKV.
Do I need to install any software?
No. The WMA to MKV converter runs in any modern web browser on Windows, macOS, Linux, Android and iOS. There is nothing to download or install.
Is there a file size limit?
Because the conversion runs on your own device, the practical limit depends on your computer's memory rather than a server quota. Most everyday WMA files convert instantly, and there is no artificial cap.
How long does it take to convert WMA to MKV?
For typical files it is almost instant, since the conversion happens locally with no upload or download wait. Large media files take a little longer because your device does the encoding, but there is never a queue.
What is the difference between WMA and MKV?
WMA (Windows Media Audio) is a lossy audio format created by Microsoft. It was common on older Windows systems, so converting it to MP3 or another modern format improves compatibility. MKV (Matroska) is a flexible open container that can hold video, multiple audio tracks and subtitles in one file. It is popular for high quality movies and archived video. Converting WMA to MKV gives you the strengths of the MKV format for your specific use case.