MP4 to MKV Converter
Convert your MP4 videos to MKV format. MKV (Matroska Video) is a flexible container that supports multiple audio tracks, subtitles, chapters, and metadata. All processing happens in your browser.
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Drag and drop your image below to start converting. All processing happens in your browser — your files stay private.
After selecting a file, you'll be taken to the converter where you can choose your output format and download the result.
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Frequently Asked Questions
What makes MKV different from MP4?
MKV is a more flexible container format that can hold unlimited video, audio, and subtitle tracks in one file. MP4 is more widely supported but has more limited track capabilities.
Can MKV play on smart TVs?
Many modern smart TVs and streaming devices support MKV playback. For older devices, MP4 format is recommended for better compatibility.
Why would I convert MP4 to MKV?
Convert to MKV when you need to preserve multiple audio tracks (different languages) or embedded subtitles. MKV is ideal for archiving movies and complex video content.
Is my video file uploaded to a server?
No. The conversion happens entirely in your browser. Your video file never leaves your device.
Privacy First
All conversions happen entirely in your browser. Your files are never uploaded to any server. No accounts, no tracking, no data collection. Built by Nexora Creation.