Top 13 Ways to Convert MKV to MP4 Free Online

Know the best MKV video files to MP4 converter-free and convert MKV to MP4 without losing quality.

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Part 1. How to Convert MKV to MP4 on Computer

There're countless video converter software available for file conversion in the market, but honestly speaking, Wondershare UniConverter (originally Wondershare Video Converter Ultimate) is worthy of the best Matroska converter tool. With a simple interface, batch processing, customizable output file formats, etc., Wondershare video converter meets all your needs of converting MKV to MP4 without losing your multiple subtitles.

Find more video ideas from Wondershare Video Community.

Wondershare UniConverter

  • Convert MKV video files to MP4, MPEG, MOV, AVI, and 1000+ formats.
  • Batch convert video and audio files in original quality.
  • Batch convert multiple media files without limits.
  • Support 30X faster conversion speed than any competitors.
  • Supported OS: Windows 10/8/7, Mac OS X 10.15 (Catalina) -10.6.

1.1 How to Convert MKV Videos to MP4 Fast without Losing Quality

Although MKV is an accessible format for high-quality movies and TV episodes, it's not widely-supported by modern devices. In that case, we need to find a way to alter the MKV file to MP4.

Add Your MKV File
Run Wondershare video converter, click to add files, and you'll get a pop-up window, select MKV file you want to convert in MP4, and click Open to load an MKV codec file.
Choose MP4 as output format
Select MP4 as Output Format
Hit the below-arrow from the Target section, go to Video > MP4, and choose the same resource, which ensures you convert video to MP4 without losing quality.
Convert MKV to MP4
Start Converting to MP4 from MKV
Click the Start All to start changing the file to MP4. Once the video conversion completes, you can switch to the Finished tab to get the converted mp4 video in the original resolution.

1.2 How to Convert MKV Files to MP4 in Batch

If you have loads of files to convert, you can follow the steps below to batch convert files to MP4.

Add MKV videos
Import Multiple MKV Videos
Launch the program, and you'll get the primary interface under the Video Converter section by default. Then directly add multiple MKV files to the top MKV video converter software.
Turn MKV to MP4
Convert MKV Video Files to MP4 Format
Click the below-arrow beside the Output Format, choose MP4 under the Video tab, and select your desired quality in the right. Then you'd find all loaded MKV media files will be changed to MP4 format.
Start MP4 conversion
Batch Convert Matroska Files to MP4
Click the Start All in the bottom-right to start converting multiple files to MP4 at one time. Note that turn on the High-Speed Conversion console, as pointed in the screenshot, would speed up the whole files to MP4 conversion.

1.3 How to Convert Remux MKV Videos to MP4

Remux refers to transmit the information contained in Blu-ray or HD DVD without quality deterioration in both video and audio. Below we'll show you how to convert MKV file to MP4 with Xmedia Recode.

Remux MKV to MP4

Step 1: Download and install Xmedia Recode on your computer, click Open File to load the MKV video you want to convert to MP4.

Step 2: Go to the Format tab to choose MP4. You can also switch to Video, Audio, and other tabs to check the settings.

Step 3: Select Save to folder beside Output: and click Browse to specify the destination. After that, hit Encode to start converting.

convert mp4 to mkv tips
Wondershare MKV converter converts MP4 to MKV and vice versa, Learn more MP4 to MKV conversion tips here >

Part 2. 2 Helpful MKV to MP4 Converters for Mac

Convert MKV to other format for Mac

2.1 Wondershare UniConverter for Mac

Mac users can benefit a lot from the best Mac MKV converter mentioned above. It provides a lossless conversion between MKV, MOV, MP4, VOB, and over 1000 media formats on Mac devices with OS X 10.6 or later converts your MKV video to specific devices like iPhone, iMovie, Final Cut Pro, etc. to avoid any compatibility issues. Check to learn how to convert MKV files to MP4 on Mac >.

Macx video converter pro

2.2 MacX Video Converter Pro

Mac Video Converter Pro is another all-in-one tool that converts video through exceptional format compatibility like MKV, WMV, AVI, and other 320+ audio and video formats. With it, you can enjoy QuickTime and iTunes while editing videos via iMovie or Final Cut Pro. However, the of the Mac converter's major deficiency lies in it's too expensive for common users, and there’s no discount provided online.

Part 3. Another 10 Ways to Convert MKV to MP4 Free and Online

How do I convert MKV to MP4 online?? --- A question from Quora

3.1 MKV to MP4 Converter Free

What is the best free MKV to MP4 Converter? Wondershare Free Video Converter is the best MKV to MP4 converter free, which functions almost the same steps as Wondershare UniConverter. The main differences lie in some limits in the conversion and download. You can freely download the freeware via the download button below and use it anytime.

import video to mkv to mp4 converter free

Free Video Converter

  • Free convert MKV to FLV, MOV, MP4, AVI, and 1000+ formats.
  • Trim, crop, edit MKV video before converting to MP4.
  • Convert videos faster than any free competitors.
  • Download videos from YouTube.

How to Convert MKV Files to MP4 Free

Add MKV file
Import MKV Files to Wondershare Free Video Converter
Click the Add Files button to import files to Wondershare MKV converter free, or directly drag them to the main interface.
Choose MP4 output format
Choose MP4 as Output Format
Hit the Format icon in the upper-right corner to get the full list of output file format, choose MP4, and the resolution under the Video tab.
Convert MKV to MP4
Convert video to MP4 Free
Click Convert All in the bottom-right corner to free convert video to MP4 right away.
3.2 Online MKV Converter

'How do I convert MKV to mp4 for free?' If you would like to convert MKV to MP4 online free, you can have a look at (originally 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 file formats with a brief but complete data. What's more, you can add two files to convert for each time with a maximum of 100MB files for conversion.

You can add you any video files, select the MP4 format, then click the "Convert" button, the video will be converted to MP4 for free just in a few minutes. Very easy and fast!

convert mkv format to mp4 online

3.3 Convert Video Using VLC Media Player

VLC Media Player, widely-known as a cross-platform player for Windows/Mac/Linux/iOS/Android, also excels in converting features. 'How do I convert MKV to mp4 with VLC?' You can easily use VLC convert MKV files to MP4 within several clicks. Here's the overall guide as below.

Access VLC media player
Install the latest VLC media player on your PC and run it afterward, Click the Media tab and select Convert / Save... to get the Open Media window.
Import MKV file
Click the Add button to select local MKV files and hit Convert / Save on the bottom to enter the Convert window. Then choose Video - + MP3 (MP4) as the out profile.
Convert mkv file to mp4 vlc
Tap Browse to customize the Destination where you want to save the converted MP4 file. After that, click the Start button at the bottom to start converting MKV files to MP4 with VLC right away.
3.4 Using CloudConvert

CloudConvert is an online converter that also enables you to set output preferences such as video codec, audio codec, CRF, audio bitrate, etc. The web tool can accept the source MKV files from their URL, Dropbox, Google Drive, your computer, and OneDrive, and can convert them in a few simple steps that are explained below:

cloudconvert convert MKV to MP4

Step 1: Click Select File, and use the box that opens next to upload the MKV video from your PC.

Step 2: Click the Settings icon next to the Convert to drop-down list, select the output preferences, and click Okay from the bottom.

Step 3: Ensure that MP4 is selected in the Convert to drop-down list, and click Convert to convert the file.

3.5 Using ConvertFiles

With no pricing plan, ConvertFiles is a free online MKV file converter that allows you to upload the files from your PC, choose an output format according to your preferred codec (MP4 with / for this example), and convert the video without any hassle. The process to convert MKV videos to MP4 with ConvertFiles is given below:

ConvertFiles convert MKV to MP4

Step 1: Click the Browse button present next to the Choose a local file field, and select and upload the MKV file from your local hard drive.

Step 2: Choose the output format (MP4 here) from the Output format drop-down list.

Step 3: Check the Send a download link to my email box (optional), and click Convert to convert MKV files to MP4 online.

3.6 Using Online-Convert

A free MKV video files to MP4 converter, Online-Convert has a list of presets with pre-configured resolution and other preferences for you to choose. Also, the solution also lets you define the start and end time for the uploaded video for basic trimming. The process of using Online-Convert to convert files to MP4 is explained below:

Online-Convert convert MKV to MP4

Step 1: Click Choose Files and follow the instructions to select and upload an MKV video from your PC. Alternatively, pick any other option like Entering URL, Dropbox, or Google Drive to upload the file from their corresponding locations.

Step 2: Select your preferred preset from the Choose a Preset drop-down list from under the Saved settings section.

Step 3: Click Start conversion to convert your MKV file to MP4.

3.7 Using Freemake Video Converter

Not an online tool but still free to download and use, Freemake allows you to convert files to MP4 in offline mode. Apart from this, the program also lets you convert the video files to DVD format, for Youtube, to MP3, and much more. You can download the program on your computer and follow the instructions given below for conversion:

Freemake convert MKV to MP4

Step 1: Launch Freemake Video Converter, click +Video from the top-left corner and select and import the MKV file you want to convert.

Step 2: Click to MP4 from the bottom of the interface.

Step 3: On the MP4 output parameters box, select your preferred preset from the Preset drop-down list, set a destination location in Save to, and click Convert from the bottom.

3.8 Using Handbrake

Handbrake is the best free converter for converting video from nearly any format to two supported codecs MKV and MP4. It is free, so the output file format is very limited, but you only want to convert to MP4 or MKV, this tool can basically meet your needs.

Handbrake convert MKV to MP4

Step 1: Launch Handbrake video converter, click the Source button on the toolbar and select Open File to open your MKV file.

Step 2: Click the Browse button under Destination to customize a folder where the converted .mp4 file will be saved to.

Step 3: Go to Output Settings and choose MP4 as a container; note HandBrake selects MP4 file format by default. Now just click the Start button in the top, and HandBrake will convert your MKV format to MP4 format.

3.9 FFmpeg Converting without Re-encoding

FFmpeg is the free cross-platform converter that enables you to convert MKV to other video formats. Unlike the common converting interface, there's no add file, output format button within Ffmpeg, all you need is to use the basic FFmpeg command to specify MKV to video conversion.

ffmpeg convert MKV to MP4

Step 1: Download FFmpeg on your computer first, then find the MKV video you want to convert to MP4.

Step 2: Run the following command to convert files in Terminal: ffmpeg -i my_movie.mkv -vcodec copy -acodec copy my_movie.mp4

Step 3: After a while, you can get MKV converted to MP4 video lossless on PC.

4.0 Using APP is a free online web application that allows you to convert video to MP4. It's also a mobile compatible file converter app that allows you to convert MKV files with Android, Apple, and Windows devices.

App convert MKV to MP4

Step 1: Choose a .mkv video your mobile device.

Step 2: Select MP4 as the output file format from the drop-down menu.

Step 3: Click the Start button to start MKV to video conversion.

Part 4. Tips on Converting and Playing MKV

4.1 MKV vs. MP4

Description MKV file is generally “Matroska” files. Those contain audio (movies) or video only. MKV file is an envelope for which there can be many audios, videos, and subtitles streams, allowing the user to store a complete movie with subtitles. MP4 is a multimedia-file 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.
Category Video File Video File
Associated Programs VLC, KMPlayer, ALLPlayer, Elmedia, HandBrake, Studio, PowerDVD and many more Apple QuickTime Player, Apple iTunes, Windows Media Player
Developed by Matroska Moving Picture Experts Group
MIME Type Video Video, Moving-image, Sound, Aggregate

4.2 How to Add MKV File to iTunes Media Library

Does iTunes support MKV format?
Although some famous players like VLC support it, iTunes doesn't. The latest iTunes 12 only accepts MOV, MP4, and M4V video format, so you cannot add your MKV file to the iTunes media library.
Is there any way out to add the MKV file to iTunes?
The easiest and fastest way is to convert MKV to iTunes compatible format. You can refer to the above tutorials to try converting MKV to MOV or MP4 format.

4.3 Perfect MKV Player for Win and Mac

MKV is a free, open-source container format that holds different types of video, audio, picture or subtitle tracks, making it unrecognizable by a common player. Here we'd recommend two omnipotent MKV players for both Windows and Mac systems.

4.3.1 Wondershare Player

Wondershare UniConverter also functions as a media player, which supports streaming any popular media files within simple steps.

UniConverter convert MKV to MP4

Step 1: Drag and drop your MKV files to the Wondershare MKV player.

Step 2: Move the mouse over the loaded video thumbnail, you'd see a Play icon in the middle.

Step 3: Tap the Play icon, and the MKV video will start playing immediately.

4.3.2 VLC Media Player

VLC is a free and open-source multi-platform multimedia player that plays MKV, WebM, MPEG-2, MPEG-4, , and most codecs with no codec packs needed. To play MKV with VLC, you can either click Media > Open File... or directly drag MKV video to the player.

play mkv video with vlc

4.4 Tips about MakeMKV
What is MakeMKV?
MakeMKV is a format converter or transcoder that converts your video into a free and patents-unencumbered format that can be played everywhere in one click. In addition, MakeMKV streams decrypted video without intermediate conversion to a wide range of players allowing you to watch Blu-ray and DVD discs with ease.

4.5 Tips about MKV Codec

What is the MKV codec?
MKV Codec is a lightweight and powerful media interface that enables users to access and play MKV files.
Where are free MKV codec packs?
Combined Community Codec Pack(CCCP) is the best recommended MKV playback Codec Pack, which includes almost all you need to play .mkv (Matroska video) and .mka (Matroska audio) files. Once this codec pack is installed, Classic Player or Windows Media Player can play video animation MKV format immediately.

4.6 Top Converting Formats from MKV

Resources > MKV > All Best and Free Ways to Convert MKV 2019

All Topics


1. Play MKV on Device+
  1. 1.1 Top MKV Player
  2. 1.2 Play MKV on Mac
  3. 1.3 Play MKV on Apple TV
  4. 1.4 Play MKV on Samsung TV
  5. 1.5 Play MKV on Sony TV
  6. 1.6 Play MKV on LG TV
  7. 1.7 Play MKV on PS3
  8. 1.8 Play MKV on Xbox One
  9. 1.9 Play MKV on Xbox360
  10. 1.10 Play MKV to iPhone
  11. 1.11 Play MKV to iPad
  12. 1.12 Play MKV on iPod
  13. 1.13 Play MKV on Android Phone
  14. 1.14 Play MKV in VLC
  15. 1.15 Play MKV in Windows Media Player
  16. 1.16 MKV Playback Issues in VLC
2. Convert MKV to Other Format+
  1. 2.1 Convert MKV to MP4
  2. 2.2 Convert MKV to MP4 on Mac
  3. 2.3 Convert MKV to MP4 Online
  4. 2.4 Convert MKV to MP3
  5. 2.5 Convert MKV to Audio
  6. 2.6 Convert MKV to WMV
  7. 2.7 Convert MKV to M4V
  8. 2.8 Convert MKV to AVI
  9. 2.9 Convert MKV to AVI Online
  10. 2.10 Convert MKV to FLV
  11. 2.11 Convert MKV to DVD
  12. 2.12 Convert MKV to MOV
  13. 2.13 Convert MKV to iTunes
  14. 2.14 MKV to MOV Converter Online
  15. 2.15 Convert MKV to VOB
  16. 2.16 Convert MKV to DivX
  17. 2.17 Convert MKV to MPEG
  18. 2.18 Convert MKV to MPEG2
  19. 2.19 Convert MKV to MPEG4
  20. 2.20 Convert MKV to XviD
  21. 2.21 Convert MKV to 3GP
  22. 2.22 Convert MKV to M2TS
  23. 2.24 Convert MKV to TS
  24. 2.25 Convert MKV to VCD
  25. 2.26 Convert MKV to AC3
  26. 2.27 Burn MKV to DVD
  27. 2.28 Burn MKV to Blu-ray
  28. 2.29 Convert MKV to SWF
  29. 2.30 Convert MKV to MP4 with Subtitle
  30. 2.31 Convert MKV to WAV
  31. 2.32 Convert MKV to MPG
  32. 2.33 Convert MKV to ISO
  33. 2.33 Convert MKV to WebM
3. Convert Other Format to MKV+
  1. 3.1 Convert MP4 to MKV
  2. 3.2 Convert MP4 to MKV on Mac
  3. 3.3 Convert MP4 to MKV Online
  4. 3.4 Convert M4V to MKV
  5. 3.5 Convert WMV to MKV
  6. 3.6 Convert MOV to MKV
  7. 3.7 Convert DVD to MKV
  8. 3.8 Convert M2TS to MKV
  9. 3.9 Convert AVI to MKV
  10. 3.10 Convert FLV to MKV
  11. 3.11 Convert AVCHD to MKV
  12. 3.12 Convert OGM to MKV
  13. 3.13 Convert MTS to MKV
  14. 3.14 Convert WTV to MKV
  15. 3.15 Convert VOB to MKV
  16. 3.16 Convert RMVB to MKV
  17. 3.18 Convert WebM to MKV
4. Edit MKV & Other Tips+
  1. 4.1 Extract Subtitles from MKV
  2. 4.2 Add Substitles to MKV
  3. 4.3 Add SRT to MKV
  4. 4.4 Compress MKV Video
  5. 4.5 Reduce MKV File Size
  6. 4.6 Cut MKV Files
  7. 4.7 Edit MKV Metadata
  8. 4.8 MKV No Sound
  9. 4.9 MKV Video Player for Android
  10. 4.10 MKV Converter for Mac
  11. 4.11 Free MKV Converter
  12. 4.12 MKV Player Mac
  13. 4.13 2D to 3D MKV Converter
  14. 4.14 Remux MKV
  15. 4.15 MKV Encoder
  16. 4.16 Convert MKV to FCP Mac
  17. 4.17 Stream MKV to TV with Chromecast
  18. 4.18 Import MKV to iMovie
  19. 4.19 Windows DVD Maker MKV
  20. 4.20 Convert MKV to MP4 with HandBrake Alternative
  21. 4.21 What is an MKV File
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