Home > Video > Convert MKV > Online MKV to MP4 Converter

Top 3 Free MKV to MP4 Converter Online

Website is a magic place where you can always turn something valuable. A good case in point centers on the web-based converter online, which is available for you to convert MKV to MP4 format online for limitless playback on mobile devices without even downloading a program. However, Website is also a chaotic place where it's really tough to find a truly workable online MKV video to MP4 converter for 2021. This guide shares top 3 best online converters for changing the format to MP4 from MKV, free or paid, and desktop software so that you can deal with the conversion with no file size limitation or virus/malware infection.

Video Converter

Free Download MKV to MP4 Converter - 100% Clean

MacX Video Converter Pro - World's no.1 fast tool to convert MKV to/from MP4 as well as other formats like AVI, MOV, WMV, H264, H.265, MPEG4, etc on Mac or PC to avoid video size limitation, virus transmission or website loading issue.

Top 3 Best Online MKV Video to MP4 converter 2021

  1. Clipconverter
  2. It is a free MKV video to MP4 converting app online that manages to record, download and convert video to MP4 on Mac/Win, like MOV to MP4, 3GP, AVI and MOV online. If you are looking for a nick interface, the web service is the top choice. All you need to do is to paste your YouTube URL, choose the download quality, name your file and take the format you want to have it in. You don't even have to change the settings but leave these at default as it will automatically detect the best settings for you.

    Attention: Clipconverter is said to be bound with virus and malware and is usually involved in not working issues, probably due to the network problem, outage or website maintenance. So it's advised to find a Clipconverter alternative to avoid the issues for online conversion from MKV to MP4.

    Clipconverter to online convert mkv to mp4
  3. Zamzar
  4. Created by brothers Mike and Chris Whyley in England, Zamzar is another online video converter supporting 1000+ conversion types, including songs, videos, images and documents and outputting a variety of formats like MP4, MKV, MOV, VOB, WMV, MP3, AC3, etc. Customers give high mark for its easiness. You just visit its site, upload MKV file online, choose MP4 as output format and hit the Convert to start to convert MKV to MP4 online. Despite it's free to use, you can access to online file management, shorter response and queuing time once paying a monthly subscription.

    Attention: Zamzar stopped providing support for YouTube download as a result of C&D order from Google on June 12, 2012. And the 100MB file size limit makes it impossible to use for the conversion online.

    zamzar online mkv to mp4 converter
  5. Onlinevideoconverter
  6. As another free online video converter web app in 2020, Onlinevideoconverter is able to convert MKV to MP4, as well as convert MP4 to MKV online without the need of install any software on your computer. Fully compatible with all mainstream browser, this MKV to MP4 converter online works as a Firefox add-on, a Chrome extension and a Safari extension. Besides, it supports downloading videos from YouTube, Dailymotion, Vimeo and other online video portals.

    Attention: There is nothing you can do except waiting when you have trouble getting the website to load, probably because the server is overloaded, down or unreachable for the network problem, outage or website maintenance. Besides, 25% users report adware, spyware or viruses and 25% complained about its phishing or other scams.

    onlinevideoconverter convert mkv to mp4

Other Options to MKV to MP4 with No Online Conversion Size limits, Virus

After the roundup of best 2021 online MKV to MP4 converter, we'd like to share something that customers matter most. Web-based file conversion tool is always bound to website loading issue and requires a limited file size, usually less than 100MB, making it a pain for uploading. The vulnerability to virus or malware is still an Achilles heel for most online video converters, let alone the absence of batch conversion option. So the best remedy for this is to find a desktop MKV to MP4 video converter rather than an online tool. Here are the top 2 highly recommended free video converter for Mac/PC 2019 your reference.

Handbrake - An open-source video transcoding program receiving high accolades among windows and Mac users. You just simply input the MKV file by clicking on "Source" then "open file" from the dropdown menu, choose the output setting MP4. And then hit the "Start" button to accomplish the conversion. What attention shall be paid is many issues will occur, like A/V sync problem, no valid source found, and subtitle issues, when you convert MKV with Handbrake. So you'd better turn to a Handbrake alternative for the task.

MacX Video Converter Pro - All-in-one video downloader, video converter, video editor, screen recorder and slideshow maker. It allows you to download videos from YouTube, Vimeo, Vevo, Facebook, Dailymotion, Instagram and another 1000+ online video portals. Rather than a simple desktop MKV to MP4 converter, it allows you convert other SD/HD videos (4K 8K UHD included) to a wide range of formats like MP4, MOV, AVI, WMV, MPEG4, H264, etc. You can even choose the preset profiles from the pop-up window for direct playback videos on iPhone XS/XR/X/8/7/SE/6S/6S Plus/6/6 Plus, iPad Air 2, Samsung Galaxy S9, HTC 10, Surface Pro 4, and other game consoles, gadgets at one go. Below is the detailed guide on the video conversion from MKV to MP4.

Step 1: Import MKV file by clicking "Add File".
After free download the converter 2019 on your computer, click "Add File" button to load the MKV files.

Step 2: Choose the Output Video Format.
Select the output video you desire. If you want to convert MKV to MP4 on Mac OS X, you go "Mac General Video" and choose "MP4 video". To better fit your player or portable devices, it's at your disposal to customize the output video like resolution, frame rate, bit rate, sample rate, etc. If you are merely a newbie, this program automatically sets all the parameters with the optimal quality and fastest speed.

Step 3: Select Output Folder.
Click the "Browse" button to choose the path where you want to save the output files in.

Step 4: Start Conversion.
After finishing the above steps, click the "RUN" button to start converting MKV video format to MP4 on your Mac computer.

Convert MKV to MP4

Still have any problem on how to convert MKV to MP4, just email us >>