MP4 to MKV Converter
Convert MP4 video to the flexible MKV container for media libraries, desktop players, home media systems, and editing workflows.
Drop your MP4 files here
Up to 250MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your MP4 files
Drag and drop or select MP4 files from your device. You can upload multiple files at once.
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Configure Output
Choose the video quality and keep the source dimensions or reduce the output size proportionally.
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Download MKV files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert MP4 to MKV?
MP4 is a widely supported video format used by phones, computers, websites, televisions, and social platforms. Converting it to MKV creates a flexible Matroska video container used for media libraries, desktop playback, and home entertainment, ready for workflows that use the destination format.
MKV plays in VLC, Plex, Kodi, many smart TVs, desktop media players, and home entertainment applications.
Frequently Asked Questions
What is the benefit of converting MP4 to MKV?
MP4 is a widely used playback and sharing container. MKV is a flexible container popular in desktop and home media libraries.
Where can I use the converted MKV video?
The completed MKV is well suited to media centres, organised video collections, desktop players, and editing workflows.
Can I choose the MKV quality and size?
Yes. Choose the visual quality and use the output size slider to retain the source dimensions or reduce them proportionally.
Will the converted video include sound?
Yes. Crest Convert includes the first audio track when the source video contains one. A video without an audio track remains a silent video.
Can I convert several MP4 videos?
Yes. Add multiple MP4 files, convert them together, and download each completed MKV file when it is ready.
How is my MP4 video handled?
Your MP4 file is transferred over an encrypted connection, converted securely, and automatically deleted shortly after processing. No account is required.