Are you looking for the best way to convert MKV to MP4? MKV and MP4 are two video container formats for storing audio and video data. DVD and Blu-ray rips are often found in MKV, which gives more freedom to contain as many audio/video/subtitle tracks as needed. However, to watch those rips on iPad, iPhone, or other portable devices, MKV suffers from poor compatibility in comparison with MP4. And this is when we find it necessary to convert MKV to MP4. In the following guide, we will walk you through 12 easy and free ways to convert MKV to MP4 using VLC, VideoProc Converter AI, HandBrake, FFmpeg, Avidemux, and free online MKV to MP4 converters. Check them now.
Convert MKV to MP4 with the Best MKV to MP4 Converter
1. Use VideoProc Converter AI
When you need a fast, easy, and high-quality MKV to MP4 converter, VideoProc Converter AI should be your first port of call. This all-in-one video and audio processing software fully utilizes hardware acceleration technology, letting you convert MKV to MP4 at a speed 47x faster than the original. Better yet, it comes with the Auto Copy mode. Under this mode, you can remux MKV to MP4 within a second without re-encoding or quality loss. Thanks to a self-explained interface, you're never left feeling in any doubt about what you're meant to do.
- No pop-ups, ads, or watermarks. No limit on file size or length
- Intuitive interface. Convert a bulk of MKV files with a simple click
- Remux MKV to MP4 in seconds (No re-encoding or quality loss)
- Handle the conversion of 420+ formats, incl. 4K, MKV, MOV, and AVI
- Easily adjust video resolution, bitrate, quality, and more properties
- Also a handy video editor, video downloader, screen recorder, etc
- New AI tools to enhance video and image to the maximum quality
Note: The Windows version now supports AI-powered Super Resolution, Frame Interpolation, and Stabilization to enhance video and image quality. These AI features are not yet available in the Mac version but will be coming soon.
Step 1. Open the MKV to MP4 Converter
Launch VideoProc Converter AI after installing it on your Windows 10/11. Click Video Converter. The steps below show how to convert MKV to MP4 on Windows. This powerful video converter can also be used to convert MKV to MP4 files on Mac.
Step 2. Import the MKV Files
Click the +Video Folder button to load the entire file folder; or you can just directly drag the MKV files into this software.
Step 3. Select MKV as the Target Format
Jump to the bottom of this MKV to MP4 converter. Click the Video option and choose MP4 (h.264). If MP4 is not there, you can also check the Target Format button to find it. If you need to change the frame rate, resolution, aspect ratio, or other properties of the MKV file, click the gear button of the Codec Option to acess the crossponding setting options.
Simply check the option box of Auto Copy. This enables you to remux MKV to MP4 without re-encoding, so there is no quality loss. Just keep in mind, remuxing only works when the input MKV and output MP4 share the same video and audio codecs. For example, you can remux an MKV file with H264 video and AAC audio to an MP4 with H264 video and AAC audio. But you cannot convert an MKV with H264 video to an MP4 with H265 video.
Step 4. Start the Conversion
Check NVidia/Intel/AMD for enabling the level-3 hardware acceleration. This can make the conversion process fast and low CPU usage. Check High Quality Engine to get the best possible picture quality. Hit RUN to start converting MKV to MP4 on Windows 11/10.
Convert MKV to MP4 with VLC and Other MKV to MP4 Converters
2. Use VLC
VLC media player is widely recognized as a free and open source audio and video player capable of playing a wide range of media formats, including those from external media libraries and Blu-ray discs. It also serves as a powerful and free MKV to MP4 converter, supporting the conversion from MKV to MP4, AVI, MOV, WebM, and plenty of other multiple media formats.
Step 1. Download and install the most recent version of VLC on your Windows PC. Open it up. Click Media > Convert / Save to navigate yourself to another window.
Step 2. Click Add button to import the MKV file(s). After all files are imported, just click the Convert / Save button to go on.
Step 3. Choose Video - h.264 + MP3 (MP4) as the output format.
Note: You can also choose Video for MPEG4 720p TV/device or Video for MPEG4 1080p TV/device, and then choose the wrench tool which will allow us to set more parameters about this format. In Encapsulation, choose MP4/MOV; in Video codec and Audio codec, you can choose different coding ways for the original video and audio tracks, or you can also just check the Keep original video/audio track to change nothing.
Step 4. After all the settings are done, you can click the Start button to start converting MKV to MP4 in VLC.
Converting MKV to MP4 using VLC media player may have some problems, such as being slow, no audio, choosing wrong audio track as the default language
3. Use HandBrake
HandBrake is an open source and free MKV to MP4 converter for Mac, Windows, and Linux which is trusted by a lot of people. It comes with a very nice user interface which is easy to learn. It can process almost every video format used by us. With this cross-platform and free MKV to MP4 converter, you can also apply video filters, change dimensions, adjust codec and frame rate, add audio track, etc.
Step 1. Install the latest version of Handbrake from its official page.
Handbrake runs on Windows, Mac and Linux. Choose the correct version according to your system.
For instance, for Windows computer, you can go to Control Panel\System and Security\System to check whether its x64 based, or ARM based, 32bit or 64bit.
Step 2. Launch Handbrake, and follow its instruction to install .NET 6.0 framework.
For the first time when you initiate Handbrake, you may see a prompt saying "install missing frameworks for .NET".
Click that link provided in Handbrake, or visit it here:
Step 3. Add MKV into Handbrake.
Hit the button File to import the MKV file(s). You can click the Folder menu for batch scanning, or the File menu for single item, or just directly drop the file into it.
Step 4. Choose an output preset according to your specific situation. For instance, if you only want to swap MKV to MP4, without changing video resolution, you need to make sure the preset use the same resolution as your source video.
To do so, click the Dimension tab to check the resolution of the source video. If it says 3840x2160, then you will want to use a 2160p preset.
Step 5. Select MP4 as the output format.
After the file imported, choose the MP4 option under the Summary tab, and then go to other columns to adjust more settings for this file. If the file extension is .m4v, you can force it into .mp4 by adjusting the preference settings. Go to Tools > Preferences > Output files > Mp4 File Extension. Select "Always use MP4" from the dropdown menu, instead of "Automatic".
Step 6. After all settings are done, jump to the Save As option to choose the output path.
Step 7. Click the Start Encode button to convert MKV to MP4 for free using Handbrake.
4. Use FFmpeg
FFmpeg is an open-source tool to deal with multimedia data. It supports to convert .mkv to .mp4 and other formats without quality loss. Besides, it enables you to record, stream media files, and decode, encode, transcode, play, filter, mux, demux almost anything created by machine or human. As a cross-platform converter, FFmpeg goes compatible with Linux, Mac OS X, Microsoft Windows, and other platforms like Android and iOS in mobile platforms. This MKV to MP4 converter software is impressively powerful to many extents, but the drawback for many users is that it doesn't provide you a common and straightforward interface like +Video or Select Output Format. But no need to worry about it as we will show you the beginner-friendly tutorial on how to convert MKV to MP4 for free using FFmpeg.
We will start from how to intall FFmpeg on your Windows computer. If you have FFmpeg installed, please directly jump to Step 6.
Step 1. Download FFmpeg Windows's package and choose the latest 32bit or 64bit Static version from here.
Step 2. Right-click it and extract the ffmpeg.exe from the 7z file with 7zip.
Step 3. Create a new folder under system directory (usually the OS/C: folder), and name it as FFmpeg.
Step 4. Paste all the unpacked files to the file folder FFmpeg.
Step 5. Go to My computer > Properties > Advanced system settings > Environmental Variables > New, then set the variable name as Path, and the Variable value as C:\FFmpeg\bin. > Click OK.
Step 6. Press Windows Key and R, and then tap in CMD to open Command Prompt in administrator mode.
Step 7. Tap in ffmpeg –version, and press Enter. If there are many content displays, you have got the installation work done.
Step 8. Copy the path of the source MKV video.
Step 9. Enter a space, tap in cd, press space, then paste the path of the source video there. Press Enter.
Step 10. Enter ffmpeg -i my_movie.mkv -vcodec copy -acodec copy my_movie.mp4, then press Enter.
Tip: my_movie means the name of the source video. Do not miss any space.
5. Use Avidemux
Avidemux, as a free and open-source video editor, showcases outstanding performances in video processing and editing. You are allowed to cut and filer the video before or after converting. To speak of converting, the most concerned question by you, Avidemux can convert videos from, to all common formats. In other words, you are free to use Avidemux to convert MK4 to MP4, MP4 to MKV, MKV to AVI, etc. Besides, Avidemux has good compatibility and usability, which goes compatible with different operating systems, such as Linux, Mac OS X and Microsoft Windows.
Before we go into the details about how to use it for changing MKV files into MP4 format, please first make sure that you have installed the latest version of Avidemux. Otherwise, it may go crashes while working. 64-bit and 32-bit version are both available for you to choose. Check your PC to find the specific system information, don't install the wrong one.
Step 1. Start up Avidemux > Click File on the top bar and hit Open to choose MKV file(s) and import them into Avidemux.
Step 2. Select Copy as the output codec. By doing this, you can convert MKV to MP4 without re-encoding.
Step 3. Set the audio output codec as AAC. There are some audio codec is not compatible with MP4 container. Therefore, check the audio codec information. If it is not in AAC codec, select AAC (FDK/FAAC) as the audio output codec.
Step 4. Select video output format as MP4 Muxer.
Step 5. Set the output file storage Path by clicking File > Choose Save to select location and the converting process will start automatically.
6. Convert MKV to MP4 with iMyFone Filme
If you want to convert MKV video to MP4, you can easily get it done using iMyFone Filme. It is a simple and professional video editor, which can be used for video editing and video converting. Moreover, you can change the video to any format like AVI, MOV, MPEG, etc. Filme requires only a few clicks to finish the conversion from MKV to MP4.
Step 1. Download and install iMyFone Filme on your computer, and then launch it.
Step 2. Click on the Import option and import the MKV video you want to convert. After importing the video, you will see it in My Media area. Then drag the video clip to the timeline.
Step 3. Hit on the Export button and select MP4 format as the output format. Click on the Export option to export the video. That's it!
7. Use Cloudconvert
Cloudconvert is a free and fast online file converter. Established nearly 8 years, the website has helped convert more than a million files. Not only converting videos like MKV to MP4, Cloudcovnert also converts audios, images, documents, e-books, PPTs, archives, fonts, vectors, and more. Just go to the homepage, choose the input and output formats, and you can convert files within clicks. This online MKV to MP4 converter also allows you to choose resolutions, aspect ratios, codecs, fps, constant qualities, speed presets, profiles, Fit (for video sizing and scaling), and more.
- Converts MKV to MP4 within clicks.
- Friendly to advanced users. Customize video and audio parameters.
- Editing features: trim, subtitles, and watermark.
- Unlimited in video file size.
- The speeds of uploading, converting, and exporting depend highly on your internet condition.
- Has a limit in conversion numbers; 25 conversions per day.
8. Use ConvertFiles
ConvertFiles is a high-quality online MKV to MP4 converter that can help you download and convert videos to MP4, or to other preferred format from different video-sharing portals like MetaCafe and YouTube. You can take your pick amongst common video and audio formats such as MKV, VOB, 4K MP4, AVI, HEVC, MOV, MP3, M4V, WMV, FLV, 3GP, MPEG and many more.
- Provides the flexibility of converting a file found by its URL.
- The converted file is displayed in the form of a message carrying a link for downloading the file.
- Converted file is stored for one hour.
- Has a maximum limit of 250 MB in terms of file upload.
9. Use Aconvert
Aconvert is not just an MKV to MP4 online converter. With it, people can process various types of file formats, including PDF, document, e-book, image, video, audio, archive file, and webpage. The best thing about this online MKV to MP4 converter is that it can cater to both the video file and the video link and renders support to numerous output video formats such as RM, MP4, SWF, VOB etc.
- Offers the option of altering video bitrate, video size, video aspect and frame rate.
- Supports batch processing of files.
- Confidentiality of all files are maintained.
- Has a maximum limit of 200 MB in terms of file upload.
10. Use Online-Converter
Online-Converter provides you with a comprehensive solution to all your video, audio, image, document and e-book conversion needs. You can take your pick amongst different formats such as 3GP, 3G2m MP4, AVI etc. to convert your selected video URL or video file. When converting MKV to MP4, you also have options to select audio channels, video resolution, and aspect ratio.
- Offers preprogrammed device profile for converting video to iPhone, iPad, Blackberry, PS3 and similar devices.
- You can alter the video bitrate, screen size and even select the audio codec.
- Video can be rotated and flipped.
- You will require their paid version for converting videos exceeding 100MB.
11. Use OnlineVideoConverter
OnlineVideoConverter lets you process video links secured from Dailymotion, YouTube and Vimeo. Video files can be converted to numerous formats such as MP3, MKV, MP4, AAC, AVI without having to install a completely different program in your computer.
- Has an extremely easy to use interface which can cater to users of all skill levels.
- The video quality as well as the start and end time can be specified in advance.
- It is compatible with mobile devices and thus allows conversion of video in Apple, Android and Windows smartphones.
- Has maximum file size limit of 3072 MB
12. Use Apowersoft Free Online Video Converter
Apowersoft Free Online Video Converter is a full-featured online video converter, with which you can convert MKV to MP4 online without having to create an account or registering themselves.
- Allows adding effects, rotating videos, adjusting volume and many more without having to trim the video.
- Supports all popular video and audio formats such as AVI, MP4, AC3, MOV, MP3 and many more.
- Bitrate, resolution and frame rate can be set in advance.
- First time users have to download the launcher.
Just like we have mentioned above, these online tools are very much easy to use, so we have not shown you how to use them one by one in details. With them, you can simply upload the MKV files to their servers, click the convert button to start, and lastly download the converted files to your computer. That's it. And you just finish how to use them for your work.
How do I convert MKV to MP4 for free?
There are several ways to convert MKV to MP4 for free. You can download some video converter freeware, such as VLC media player and HandBrake, go find the free (trial or giveaway) version of VideoProc Converter AI, or try the free online tools like CloudConvert and ConvertFiles.
Does converting MKV to MP4 lose quality?
It is possible to convert MKV to MP4 without losing quality. You only need to remux MKV to MP4, namely, only change the container format of the video, without re-encoding or changing anything else. The Auto Copy mode of VideoProc Converter AI is made to do this job. You only need to input the file, check Auto Copy, click RUN, and let the software do the rest.
Is MP4 better quality than MKV?
MP4 and MKV are both container formats to store videos, audio, and subtitles. It's hard to say which one has a better quality, because the quality of a video file is decided by many factors but not the container. If you need to keep multiple audio and subtitle tracks, for example, in a DVD or Blu-ray, then choose MKV, since MKV can store any number and type of video and audio codes, subtitle tracks, metadata, and still pictures. If you need to output a video file in a smaller size or want it playable on more devices, then MP4 would be better.
Is MKV bigger than MP4?
It depends. When the MKV container format is used to store multiple audio tracks, subtitle tracks, and data streams, it would be larger in file size. But MKV is not always bigger than MP4 because the file size of a video depends mainly on the codec and the compression algorithm, but not the container format.