How to Convert MKV to MP4 Online?

free MKV to MP4 Converter

Add MKV file(s) that you want to convert.


Select MP4 as the output format you want to convert MKV file(s) to.


Click CONVERT to convert your MKV file(s).


Click DOWNLOAD to save your converted MP4 file(s).

Differences Between Online and Desktop Converters

online mkv converter
Online MKV Converter
  • Long-time wait
  • Up to 100MB file size
  • Popular formats supported
  • A maximum of 2 files in one conversion
  • Slow conversion speed
fast MKV converter
Desktop MKV Converter
  • 0 second wait
  • No size limits
  • 1000+ formats supported
  • Limitless batch conversion mode integrated
  • 30X faster than any converter

How to Convert MKV to MP4 and Vice Versa Easily

Standing for Matroska, MKV is a free and open multimedia file format that is not covered by any restrictive licenses and patents. The format is popularly used for HD video compression, but being heavy in nature, it is not supported by PCs, smartphones and other devices. Thus, in order to make your MKV files play smoothly on all types of devices, convert them to a compatible format like MP4. A good MKV to MP4 converter will be needed for this and Wondershare UniConverter (originally Wondershare Video Converter Ultimate) is one of the best programs for batch conversion without size limitation. It has simple to use interface that allows lossless quality MKV to MP4 conversion at a fast speed. More than 1000 formats are supported for conversion by the program and thus it also works as MP4 to MKV converter. Follow the steps below on how to convert MKV to MP4:

Step 1: Launch Wondershare MKV Converter.

After the software file is downloaded and installed, open the program on your PC/Mac.

UniConverter Logo
One-Stop Easy Solution to Convert, Edit, Burn Media Files and More.

Step 2: Add MKV files to the fast MKV converter.

To convert MKV to MP4 Mac/PC, you first need to add MKV files to the program and for this click +Add Files from the Convert tab on the interface. You can also drag and drop the files. The software also allows adding MKV files directly from the device for which click the inverted triangle icon to open drop down menu. Next, select the connected device to add file. Multiple files for batch processing can be added.

Once files are added, you can also edit them through Trim, Crop, Apply Effects and other functions. The icons for these functions are present below the thumbnail of the added videos.

Launch MKV to MP4 video converter and Add MKV files

Step 3: Select MP4 as output format for MKV to MP4 conversion.

At the upper-right corner, open the drop down menu next to Convert all files to:, from the Video tab, select MP4 as the output format and also the desired resolution. To change file parameters like resolution, bit rate, frame rate and others, you can click +Create Custom to set the customized format.

Select MP4 as output format

Step 4: Convert MKV files to MP4.

Finally, to start the MKV to MP4 Mac or PC conversion process, hit Convert All. At the Output tab, you can set the location where converted files will be saved.

Considering the simple steps and powerful functions, Wondershare UniConverter (originally Wondershare Video Converter Ultimate) is definitely the best MKV to MP4 converter.

Convert MKV files to MP4

So now all your worries on how to change MKV to MP4 in batch with high speed can be solved with Wondershare UniConverter. If you want to find more online and free ways, please check the article about top 10 best and free mkv to mp4 converters.

MKV to MP4

Using Online UniConverter (originally, it's easy to convert MKV files to a variety of other formats.

Convert MKV to AVI (Audio Video Interleave)

Convert MKV to WMV (Windows Media Video)

Convert MKV to MOV (QuickTime File Format)

Convert MKV to MPEG (Moving Picture Experts Group)

Convert MKV to WEBM (WEB Media)

Convert MKV to DIVX (DivX)

Convert MKV to M4V (MPEG-4 Video File)

Convert MKV to MP3 (MP3 Audio Format)

Convert MKV to VOB (Video Object)

Other Useful Conversions You May Concern:

MKV to MP4

WebM to MP4

AVI to MP4

MP4 to MP3 - Convert file now