MIXCONVERT

Convert MP4 to MKV

Fast, free, and secure MP4 to MKV converter.

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Convert MP4 to MKV

Looking for a reliable way to convert MP4 to MKV? MixConvert offers a fast, free, and secure solution that runs entirely in your browser. Unlike other converters, we don't upload your files to the cloud, ensuring 100% privacy for your sensitive documents and media.

How to Convert MP4 to MKV

  1. Select Your Files: Click the "Choose Files" button or drag and drop your MP4 files (.mp4) into the conversion area.
  2. Confirm Output Format: Ensure that MKV (.mkv) is selected as the target format.
  3. Convert Instantly: Click "Convert All" to start the process. Our client-side engine will transform your MP4 to MKV in seconds.
  4. Download: Once the conversion is complete, download your new MKV files individually or as a ZIP archive.

Frequently Asked Questions

How do I convert MP4 to MKV on my phone?

MixConvert is fully compatible with iOS and Android devices. Simply open this page in your mobile browser, select your MP4 files, and convert them to MKV just like you would on a desktop.

Is it safe to convert MP4 to MKV here?

Yes, absolutely. We use WebAssembly technology to process your files locally on your device. Your MP4 files never leave your computer, making this the safest way to convert private data.

Is there a limit on file size?

There are no arbitrary file size limits. Since the conversion happens on your device, the only limit is your available RAM and processing power.