Free MKV to MP4 Converter: 3 Ways to Convert MKV to MP4 Online or Offline

There are so many digital video formats around the world for video storage. All different videos’ formats have individual prosperity, usage and benefits. Like MKV can support a 1080p movie with chapter support, 2ch stereo audio, 5.1 audio, 5.1 audio with commentary which MP4 cannot. As compare to MKV format, MP4 contains much simple video files, but MP4 is widely used in portable media devices with built-in file support. This article will assist you on how to convert MKV files to MP4 for your different media devices.

Part 1. All-in-one MKV to MP4 Video Converter for Windows/Mac

There are various traditional video converter software available in the market which can convert MKV to MP4, but Wondershare Video Converter Ultimate introduces many unique and useful features including video converting.

Wondershare Video Converter Ultimate

Your Complete Video Toolbox

video converter ultimate
  • Convert to 1000+ formats, like AVI, MKV, MOV, MP4, etc.
  • Convert to optimized preset for almost all of the devices
  • 30X faster conversion speed than any conventional converters
  • Edit, enhance & personalize your video files
  • Burn video to playable DVD with attractive free DVD template
  • Download or record videos from video sharing sites
  • Versatile toolbox combines fix video metadata, GIF maker, cast video to TV, VR converter and screen recorder
  • Stream your videos from Windows or Mac to other devices, including Chromecast, Roku, Apple TV, Xbox 360 or PS3
  • Supported OS: Windows 10/8/7/XP/Vista, Mac OS X 10.12 (Sierra), 10.11, 10.10, 10.9, 10.8, 10.7, 10.6
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Step By Step Guide for Converting MKV to MP4 Using Wondershare Video Converter Ultimate:

Following the video tutorial or quick steps on how to convert your MKV files to MP4, just clicking on a few buttons.

Video Tutorial: Wondershare Video Converter Ultimate - Convert MKV to MP4

Step 1 Add MKV Files.

Run your Wondershare Video Converter Ultimate, by default the Convert section will appear in front of you. Now add your MKV media files you want to convert in MP4. For adding file, click on Add Files on the top-left corner. You can also use Drag and Drop for your files from file folder.

After selecting Add Files, another window will appear, select your file destination in your computer and select Open to load the files.

Add MKV Files -  Convert MKV to MP4 with Zero Quality Loss

Step 2 Select MP4 as Your Output Video Format.

After selecting your targeted file, you need to select MP4 as your required output format.

  • For that purpose, you need to click the drop down icon of Convert all files to:.
  • Select Video tab from drop down menu.
  • Under Video select MP4, and then double-click on the detailed preset option.

Select MP4 as the output format -  Convert MKV to MP4 with Zero Quality Loss

Step 3 Start Converting MKV to MP4.

And the last, but not least step after selecting your desired output format, just select the Convert All button and your file conversion will start.

Start Converting MKV to MP4 -  Convert MKV to MP4 with Zero Quality Loss

By clicking on the Converted tab and then the Open File Location icon, you can find out where the converted files are saved. You also can change the folder where you want to save your converted files via Preference > Location.

find the converted files -  Convert MKV to MP4 with Zero Quality Loss

Optional Edit and Customize Your Video.

As we mention before, Wondershare Video Converter Ultimate includes many fancy options which make your video beautiful, customized and editable before you convert the file.

  • After Step 2, before start the conversion, select the Edit button.
  • An editable small window appears. You can use its various key features e.g.
  • Trim, cutting the video to any length.
  • Adjust, Cropping, rotating, doing frame and resolution settings.
  • Effect, volume, colour and frames adjustment .
  • Watermark, adding text / image on your video for copyright etc.
  • Subtitle, add subtitles to your video.

find the converted files -  Convert MKV to MP4 with Zero Quality Loss

After make your desired changes you may require, click the Convert All button to start converting videos.

Part 2. Free MKV to MP4 Converter

Wondershare Video Converter Free is the best Free MKV to MP4 Converter. You can freely download this software on the website and use it any time. This converter lets you convert almost any format into any video format and it owns beautiful editable free feature.

More than conversions, its key feathers are very attractive.

  • Convert almost all famous formats.
  • Edit, enhance, and personalize Media.
  • Burn CDs and DVDs.
  • Download any video from YouTube and other websites.
  • Easy to use with user friendly interactive interface.
  • Supported Operating System: Windows 10/8/7/XP/Vista, Mac OS X 10.6, 10.7 10.8, 10.9, 10.10, 10.11.

The only problems with this free version is:

  • It does not support portable devices.
  • The output video quality decreases a little bit.
  • The conversion speed is not too fast.

Step By Step Guide for Converting MKV to MP4 Using Wondershare Video Converter Free

Actually, the steps to convert MKV to MP4 with Wondershare Video Converter Free are almost the same as the steps to convert MKV to MP4 with Wondershare Video Converter Ultimate. Only the conversion speed and the supported formats would be different for the two converters. So we only list the simple steps here, for detailed steps, you can refer to the steps for Wondershare Video Converter Ultimate.

Step 1 Add MKV File.

Step 2 Select MP4 as Your Output Video Format.

How to Convert MKV to MP4 with Zero Quality Loss on Windows and Mac

Step 3 Start converting the Video.

Part 3. Online MKV to MP4 Converter

If you would like to convert MKV to MP4 online free, you can have a look at It is accessible from any operative system and can be used from any browser. Other than that, is compatible with various file formats and offers you information about the input and output formats with a brief but complete data. What's more, you can add two files to convert for each time with a maximum of 200MB files for conversion.

wondershare online free video converter

Part 4. MKV to MP4 Converte Comparision (Online vs Free vs All-in-one)

Online MKV to MP4 Converter Free MKV to MP4 Converter All-in-one MKV to MP4 Video Converter
Convert home DVD

import songs
Convert Video to common formats
Only common formats
Only common formats
Almost all formats, over 1000 formats
Batch conversion of video files  
play ios music
import songs
Maximum upload file size
100 MB
Video Conversion speed
Fastest Video Conversion in the Industry
Video conversion quality
Lossless quality
Convert any 2D videos to a 3D format at ultrafast speeds

get songs together
Convert HD Video including 4K H.265/HEVC

itunes match
Burn video or audio to DVD for personal
transfer songs from computer to iphone
Download videos from YouTube and other 10,000+ video sharing sites
  Only YouTube website
play music on iphone
Record Online Videos
convert video
Editing functions: Clip, Split, Crop, Merge, Rotate and More

copy songs from iphone to pc
Special Effects for video editing

backup iphone photos
Add or remove Text/Image Watermark
delete ipad photos
Plug-in Subtitle

delete music and video from iphone
Transfer videos to your Apple and Android devices via Wi-Fi

transfer music from iphone to itunes
Streams your media files on a PC to a smart TV    
transfer music from iphone to itunes
Perfect DLNA support built in

transfer playlists from iphone to computer

Part 5. Extended Knowledge for MKV and MP4


MKV file is generally “Matroska” files. Those contains audio (movies) or video only. MKV file is an envelope for which there can be many audios, videos and subtitles screams, allowing the user to store a complete movie with subtitles.

MP4 is a multimedia files extension, which is a container format that can store video, audio and subtitle data (as well as more depending on content). It became more popular science the stores like iTunes uses this container format, and it is used with iPod and PlayStation Portable (PSP) as built in support, MP4 files have become more popular.
Video File

Video File

Associated Programs

VLC, KMPlayer, ALLPlayer, Elmedia, HandBrake,
Pinnacle Studio, PowerDVD and many more

Apple QuickTime Player
Apple iTunes
Windows Media Player

Developed by


Moving Picture Experts Group
Video, Moving-image, Sound, Aggregate,
Useful Links

MKV File Description and Properties
MKV developer website
Useful and technical information about MKV
How to convert MKV to AVI

More details about MP4
How to Convert and Burn MP4 to DVD
How to Play MP4 on Galaxy S4
How to Add Subtitles to MP4 Files
How to Convert MP4 to iPad (iPad Air included)

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