Convert WebM to MKV Online
Free, easy-to-use WebM to MKV converter. Transform your web-optimized videos to the versatile Matroska container format.
WebM to MKV Converter
Convert your WEBM files to MKV format quickly and easily. Upload your file and download the result.
Max file size: 50MB
Why Convert WebM to MKV?
WebM is an excellent format for web video, but the Matroska (MKV) container offers greater flexibility for media management and archiving. Converting WebM to MKV allows you to leverage MKV's superior support for multiple audio tracks, subtitles, and chapter markers while maintaining the quality of your original WebM content.
Benefits of Converting WebM to MKV
- Advanced container features - MKV supports multiple audio/subtitle tracks and chapters.
- Better media library management - Organize video content with rich metadata.
- Lossless conversion - Preserve the original video and audio quality.
- Media player compatibility - Many media players and home theater systems support MKV.
- Future-proofing - Store content in a format that's extensible and well-maintained.
How to Convert WebM to MKV Using Our Tool
- Upload your WebM video file using the upload button or drag and drop functionality.
- Our converter will automatically select MKV as the output format.
- Optionally, set start/end times if you want to trim the video.
- Solve the simple captcha to verify you're human.
- Click "Convert WebM to MKV" to start the conversion.
- Once conversion is complete, download your new MKV file.
About WebM and MKV Format Differences
| Feature | WebM | MKV |
|---|---|---|
| Primary Purpose | Web streaming | General purpose/archiving |
| Codec Support | Limited (VP8/VP9, Opus, Vorbis) | Nearly unlimited |
| Multiple Audio Tracks | Limited | Excellent support |
| Subtitle Support | Basic | Advanced |
| Web Compatibility | Native in modern browsers | Requires plugins/players |
Our WebM to MKV converter ensures a high-quality transition between formats. Since this is primarily a container conversion, the actual video and audio streams are typically preserved without re-encoding, maintaining the original quality of your WebM content.
While WebM is excellent for web delivery and streaming, MKV provides a more robust container for local storage, archiving, and playback on media center software like Kodi, Plex, or VLC. If you're building a media library or need more flexibility with your video files, converting from WebM to MKV is an excellent choice.
Other Video Conversion Options
Frequently Asked Questions
Is there any quality loss when converting WebM to MKV?
No, converting from WebM to MKV typically doesn't result in any quality loss. This is because the conversion is primarily a change in the container format rather than re-encoding the video or audio streams. Our converter preserves the original content while repackaging it in the more versatile MKV container.
Can I add subtitles to my video when converting to MKV?
Our basic converter doesn't currently support adding new subtitles during conversion. However, once you have your video in MKV format, you can use free tools like MKVToolNix to add subtitle tracks, additional audio tracks, or chapter information to your MKV file.
Why can't I play MKV files in some browsers?
Web browsers generally don't have native support for MKV playback, as they're primarily designed for online content delivery where formats like MP4 and WebM are standard. MKV is more commonly used for local media library organization and playback through dedicated media players. If you need your video to play in browsers, consider using our WebM to MP4 converter instead.