Very recently, we’ve received several emails inquiring how to play 4K MKV video without quality loss. Some people wonder what is 4K MKV and the differences between 4K MKV, 1080P MKV and average 4K video files. Actually, it’s very simple to understand. A 4K MKV, aka MKV 4K, Ultra HD MKV and UHD MKV, is in fact an MKV video file that has a resolution of at least 3840×2160 pixels (some MKV 4K video may contain 4096 x 2160 pixels). A video player that could play MKV videos can also play 4K MKV video theoretically, but the video quality differs between different MKV video players. In this post, we would like to introduce you 2 ways to play 4K MKV video files without quality loss.

Part 1: Play 4K MKV Video with 4K MKV Player

Most 4K video players would recognize 4K MKV videos and play MKV 4K videos smoothly without quality. Leawo Free 4K MKV Player is one of them. Being one of the best 4K MKV video player software apps, officially named Leawo Blu-ray Player, Leawo’s Free 4K MKV Player does far more than a single 4K MKV video player can do. Once you get a 4K display for your computer, with Leawo’s Free 4K MKV player, you get the quality-lossless 4K movie experience at home.


Leawo Free 4K Player 

☉ 100% free 4K player to play Ultra HD 4K content for totally free.

☉ Free 4K Blu-ray disc player to play 4K Blu-ray disc, regardless of disc protection and region code.

☉ Adjust subtitles, video and audio during 4K video playback for better 4K movie experience.

☉ Quality lossless Ultra HD image and audio delivering system, like that in cinema.

Free Trial Free Trial

1. Why Leawo Free Blu-ray Player is the Best 4K MKV Player?

1. This 4K video player is 100% free. You could use it to play any 4K video in any format for totally free. No in-app purchase or other kind of cost required.
2. Besides acting as free 4K video player, it’s region-free 4K Blu-ray player software to play 4K Blu-ray disc, regardless of disc protection and region restriction.
3. Free 4K video player to play up to 4K UHD/1080P Full HD video without quality loss in any format, including 4K MKV, 4K MP4, etc.
4. Select subtitles and audio tracks, even add extra subtitles. Deliver cinema-like movie experience with support of various advanced audio decoding technologies like Dolby, DTS, AAC, TrueHD, DTS-HD, etc.

2. How to Play 4K MKV Video with the Best 4K Video Player

It’s very simple to play 4K MKV video with Leawo’s Free MKV 4K player. You only need to download and install this free 4K video player on your computer (Mac users could download the Mac version). On the main interface, click the green "Open File" button to browse and load source 4K MKV video into this free 4K player software. Then, the 4K MKV video would be automatically played back within this Free Blu-ray Player.

Leawo Free Blu-ray Player

During playback, you could do some playback settings like: select subtitles, set video and audio, click for full-screen playback, add another 4K MKV video onto the playlist, etc.

Adjust 4K movie playback

Video Demo – How to Play 4K MKV Video with Leawo Free 4K Player:

Part 2: Convert 4K MKV to 4K MP4 for Playback

Some 4K video players may not accept MKV video. Therefore, you could try to convert 4K MKV to 4K MP4 video since MP4 is currently one of the most popular video formats that could be accepted by most media players. You could take use of Leawo 4K Video Converter to convert 4K MKV to MP4 4K video and then enjoy the converted 4K MKV file on your 4K MP4 video player or 4K TV.


4K Video Converter 

☉ Convert 2K or 1080P video to 4K video in different formats.

☉ Convert 4K video between 4K MKV and 4K MP4 without quality loss.

☉ Trim, Crop, Effect, Watermark to edit video.

☉ Convert 2D video to 3D 4K video in different 3D effects.

☉ Add external subtitle and select audio channel.

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Step 1: Add 4K MKV video

On the main interface, click "Video Converter" module. Then, under the "Convert" tab, click the "Add Video" button to browse and add source 4K MKV videos. You could load multiple 4K MKV videos at one time for processing.

Add Blu-ray disc

Step 2: Set output format

Click the drop-down box next to the "Add Photo" button and then select "Change" option to set output format. Navigate to "Format > 4K Video" group and choose 4K MP4 as output format. You could adjust the video and audio parameters of output 4K MP4 video like video codec, bit rate, aspect ratio, etc. according to your media player.

Set output format

Step 3: Set output directory

After setting output format, click the big green "Convert" button and then set output directory in the "Save to" box on the popup sidebar. Since 4K video files always have large storage. Therefore you need to make sure that target folder has enough storage.

Set output directory

Step 4: Convert 4K MKV to MP4 4K

Finally, click the bottom "Convert" button on the sidebar. Your 4K MKV videos would be converted to 4K MP4 videos immediately.

Convert Blu-ray

When the conversion is finished, you get 4K MP4 video files on your computer. Then you could use your media player or 4K TV to play back the 4K MP4 videos freely.

Part 3: 5 Best 4K TV Sets to Watch 4K MKV Videos

If you have a 4K TV, you could obviously use the 4K TV to play and watch 4K MKV videos. It should be noted that most 4K TV sets now support MKV video playback and deliver zero quality loss. What’s more, you could enjoy 4K MKV videos on large screen for better movie experience. BTW, 4K MP4 videos could also be played by 4K TV. The below is a recommendation of 5 best 4K TV sets under $1000 for you to watch MKV movies. Check them all and you may get a satisfied one.

Sony XBR-55X900C – $999.98

Sony XBR-55X900C

Enjoy streaming content with a clear picture and bright colors, use your smartphone or tablet as a remote control, or stream PlayStation 3 games to your TV. Plus, the Android TV function lets you download a wide array of apps and games.

VIZIO E65U-D3– $999


Simple yet intuitive, this VIZIO Smartcast E-Series 65-inch LED Home Theater Display features a speedy processor and crystal clear details with 4K Display. It also has backlighting that increases contrast and color consistency for a better viewing experience. Stream Internet entertainment with popular VIA Plus and Wi-Fi connectivity with this VIZIO Smartcast E-Series 65-inch LED Home Theater Display. 

LG 55UH6150– $799.99


Take your television viewing to new heights with this LG 55-inch Smart television, which lets you enjoy both basic cable and streaming television services. Ultra Luminance technology offers complete control over brightness and contrast. With four times the resolution of regular full HD TVs this LG 55-inch Smart television immerses you in the action of sports and film.

Sony XBR55X810C – $849.99


Watch your favorite movies and TV shows in stunning 4K resolution with this smart LED HDTV, which gives you access to streaming entertainment via Google Play. The 4 HDMI inputs and 3 USB inputs enable flexible connectivity.

VIZIO E60U-D3 – $799.99


Enhance your entertainment experience with this 60-inch Vizio SmartCast Ultra HD Home Theater Display. Stream your favorite media using the built-in Google Cast app, and use the Vizio SmartCast app to turn your mobile device into a powerful remote control. This Vizio SmartCast Ultra HD Home Theater Display uses LED backlighting and 10 active LED zones to deliver stunning graphics.