MP4 to MKV
Convert MP4 videos to MKV format with support for multiple streams and chapters
or drop files here
MP4 Format
MPEG-4 Part 14
The world's most popular video container, designed for universal compatibility and streaming
- Universal device compatibility
- Optimized for streaming services
- Efficient file structure
- Industry standard format
- Limited to 2 audio tracks
MKV Format
Matroska Video Container
Open-source container offering unlimited streams and advanced features for video enthusiasts
- Unlimited audio and subtitle tracks
- Chapter markers and menus
- Advanced metadata support
- Error recovery capabilities
- Completely open source
How to convert MP4 to MKV
Follow these steps to convert MP4 to MKV online.
Upload your MP4 file.
We convert your file and prepare the MKV output.
Download the new MKV file when the conversion completes.
About MP4 to MKV conversions
MP4 to MKV lets you convert MP4 to MKV directly in your browser. Files are processed locally so your data stays on your device.
Use this tool when you need MKV files for compatibility, sharing, or smaller sizes. It works on modern desktop and mobile browsers without installing software.
For best results, start with clean source files. Larger files take longer to process, especially for video or audio conversions.
Why use this tool
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Runs in the browser with no uploads required.
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Keeps your original file untouched.
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Works on desktop and mobile devices.
Frequently Asked Questions
Everything you need to know about our converter
Why convert MP4 to MKV?
Will I lose quality during conversion?
How fast is the conversion process?
Can MKV files play everywhere?
What's the file size difference?
Is this conversion secure and private?
Changelog
Track the latest updates, improvements, and fixes to our tools
Launched MP4 to MKV converter with stream copying
Added support for preserving all metadata
Implemented batch processing for multiple files
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