How to Convert Your MP4 Files to MKV Format without Quality Loss

Lisa Ou

Dec 30, 2019 17:00 / Posted by Lisa Ou

Though MP4 is the most widely used video format, you still have to convert MP4 to MKV or other formats in some cases. If you want to store more than one subtitle or audio track, you’d better use MKV. Plus, the lossless video formats, such as MKV, are more suitable for editing. Fortunately, you have a lot of ways to transform MP4 files to MKV format. This article will show you to best MP4 to MKV converters and how-to.

How to Convert Your MP4 Files to MKV Format without Quality Loss

1. MKV vs. MP4

MP4 is short for MPEG-4 and succeeds the MPEG-1 and MPEG-2. It is a compressed video format and produces a smaller file size. Almost all media players and digital devices are compatible with MP4.

MKV, on the other hand, is not a video format but a multimedia container. It can store an unlimited number of video, audio, picture, subtitle tracks in a single file.

2. What Are the Differences between AVI and MP4

Way 1: Ultimate Way to Convert MP4 to MKV

FoneLab Video Converter Ultimate is a powerful video format converter. It can meet all your needs of MP4 to MKV conversion, no matter you are average people or tech savvy.

  1. Convert MP4 video files to MKV format in a few minutes.
  2. Support a wide range of video formats including MP4 and MKV.
  3. Add subtitles and audio tracks into your video files.
  4. Integrate a user-friendly interface.
  5. Protect the video quality while converting.

How to Convert MP4 to MKV Quickly

Add MP4 into the best video converter

Launch the best MP4 to MKV converter after you installed in on your computer. Then click the Add File menu on the top ribbon to add the MP4 files that you want to convert.

video converter ultimate main interface

Preview your video files

The media player on the right side permits you to view your video files at any time. If you want to add extra audio track or subtitle, click the Plus icon next to the Audio bar or Subtitle bar. The software also provides video editing tools and you can click Edit menu to get them.

video converter ultimate media library

Convert MP4 to MKV

Open the Profile drop-down list, and select MKV from the General Video folder. To set the destination folder for storing the result, click the Browse button. If you want to change the custom options, click the Settings button to open the profile settings dialog. Now, hit the Convert button to initiate converting MP4 to MKV.

output format

Way 2: Convert MP4 to MKV with FFmpeg

FFmpeg is a program language to help you convert video file formats. It also provides a GUI version as well. So, you can convert MP4 to MKV easily, even you are a beginner.

Convert MP4 to MKV with FFmpeg

Run the open-source video converter and import the MP4 files to the program. You can simply drag and drop them into the interface.

Make sure to set MKV as the output format. Then customize other options or leave them by default.

Finally, turn to convert the MP4 files with the onscreen button. You’d better process one file at a time, but there is the option of batch conversion.

Way 3: Convert MP4 to MKV Using HandBrake

HandBrake is another option to convert MP4 to MKV for free. The biggest downside of HandBrake is the complicated procedure. So, we share a concrete guide below.

Convert MP4 to MKV Using HandBrake

Start your HandBrake. If you do not have it, install it from the official website.

Click the Open Source menu and import the MP4 video file that you intend to convert.

Select MKV from the drop-down under Output Settings. Then set the Destination by hitting the Browse button. Go to the Presets panel and select the proper resolution.

Finally, click the Start Encode button on the top menu bar to start converting MP4 to MKV.

Note: To add a new audio track or subtitle, you can go to the Audio or Subtitles tab.

Way 4: Convert MP4 to MKV via ConvertFiles

Online video converters, such as ConvertFiles, are another option to convert your MP4 files to MKV quickly. They even do not require software installation.

Convert MP4 to MKV via ConvertFiles

Open the online video converter in a web browser.

Click the Browse button and upload the MP4 file you wish to convert.

Choose MKV from the drop-down under Output format and click the Convert button. When it is done, download the MKV output.


As you can see, converting MP4 to MKV is not a difficult task as you though if you have the right tool. Based on the sharing above, you should master at least four methods to produce MKV files with multiple audio and subtitle tracks from your MP4 videos. FoneLab Video Converter Ultimate is the easiest option with rich useful tools. Other problems? Please, leave a message below.

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