How to Convert WebM to MKV
Add your WebM file.
Choose MKV as the target format.
Click the Convert button.
Click Download if the file was not downloaded automatically.
Convert from WebM
Convert from MKV
Convert to MKV
WHY USE THE ONLINE CONVERTER
Free File Conversion
You can change the video format of your files or use this tool as a free audio converter at absolutely no charge (up to 100 MB).
Easy Online Access
There’s no need to install any special file converter. Just a few clicks in your browser – and your files are ready. Download our extension for Google Chrome to always have quick access to this service.
Go to the Google Chrome extension page
Many Popular Formats
Choose from over 40 media formats, including many popular and rare file types. Discover more than 2,000 different combinations for video-to-video, audio-to-audio, video-to-audio, and audio-to-video conversions. Upload files as large as 2 GB.
Your files are converted on our powerful servers, so the conversion is faster than on most home computers to best suit your needs.
Safe and Reliable Encoder
Only you have access to the files you upload. Once you get your converted files, they’re immediately deleted from our servers.
Support for Dropbox and Google Drive
Now you can upload videos and music from your Dropbox or Google Drive account. There’s also an option to export your converted files to Dropbox or Google Drive.
You can also compress your videos online, including HD movies (1080p and higher), and reduce their size by adjusting the video resolution and audio quality of your files.
Converting Selected Fragments
Use the settings to choose a specific media fragment you want to process with this free video converter.