MP4 to MKV
Convert MP4 files to MKV with a focused browser-based tool.
Convert MP4 to MKV online
MP4 is a widely supported video container used across phones, browsers and streaming platforms. MKV is a flexible container that can hold multiple audio, video and subtitle tracks. Converting from MP4 to MKV is useful when you need multi-track video and archival media, or when a device, editor or website expects this video container.
How to convert MP4 to MKV
- Choose a MP4 file from your device.
- Review any available quality or output settings.
- Start the conversion and download the finished MKV file.
What to know before converting
Re-encoding compressed media can reduce quality. Use a suitable bitrate or quality setting when one is available. This tool is designed to perform supported conversions in the browser, so you can get to the result without installing desktop software.
About MP4 and MKV files
MP4 video is useful for broad playback compatibility and web delivery. MKV video is useful for multi-track video and archival media. Choosing between them depends on the software you use, the level of compatibility you need, and whether file size, editability, quality or transparency matters for your workflow.