MP4 to MKV

Easily convert mp4 to mkv With The Most Secure and Fast online tool, for free.

How to Convert mp4 to mkv?

  1. Click the “Choose File” button to select your mp4 file
  2. Click on the “Convert to mkv” button to start the conversion
  3. When the conversion from mp4 to mkv is complete, click the “Download mkv” button

Easy to Use

Simply upload your mp4 files and click the convert button. You The process of convert mp4 to mkv is quick and straightforward.

Best mp4 to mkv Converter

Best web app to convert your mp4 videos/audios into high-quality mkv format. This tool supports converting various media types including videos/audios formats.

Free & Secure

Our mp4 to mkv converter is free and works on any web browser. Your files are converted in your browser and aren't sent anywhere, ensuring complete safety.

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Your data are completely secure

The EasyPixelShift Promise: We believe your files are your business. Our conversion engine runs entirely in your web browser. Your files are never uploaded to our servers.

Zero-Server Processing

Unlike traditional online converters, EasyPixelShift utilizes Client-Side Technology (WebAssembly/JavaScript). This means:

  • No Uploads: When you open a file, it stays in your device's memory.
  • Local Conversion: The mathematical process of shifting pixels happens locally on your CPU/GPU.
  • Immediate Security: Since data is never transmitted to us, it cannot be intercepted, leaked, or sold.

What is an MP4 file?

It is a MPEG-4 Part 14; a digital multimedia container format most commonly used to store video, audio, and subtitles.

What is an MKV file?

It is a Matroska Multimedia Container; an open-standard format that can hold unlimited tracks of video, audio, and subtitles in one file.