Hewbo Video Converter will help you convert WebM to MKV with great quality, only some simple steps.
Step 1: Download Hewbo Video Converter and install it.
Step 2: Add WebM Video file.
Run Hewbo Video Converter, Click "Add File" to load your WebM video file.
Step 3: Choose Profile.
Click Profile drop-down button to choose "MKV" as your output format.
Step 4: Start to convert WebM to MKV.
Click "Convert" button to start the WebM to MKV conversion.
Step 5: WebM to MKV conversion completed.
When WebM to MKV conversion is done. You can enjoy MKV videos in your PC now!
Is it pretty simple? try this at WebM to MKV immediately.