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  18. 4.18 Convert MKV to MP4 with HandBrake Alternative
  19. 4.19 What is an MKV File

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How to Reduce MKV Size without Any Quality Loss

by Kayla Morrison • 2026-01-21 18:59:41 • Proven solutions

MKV, short for Matroska Video, is commonly used to distribute subtitled anime clips. It packs multiple types of files into one file. For example, it may contain subtitles files, audio tracks, and multiple video tracks all contained within one file. That means your MKV file is always very large. To reduce the size of MKV, Wondershare UniConverter (originally Wondershare Video Converter Ultimate) can help you. It can easily reduce the size of MKVby reducing resolution, video and audio bit rate or converter MKV to other formats as you like.

Wondershare UniConverter - All-in-One Video Converter

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  • Compress MKV and other popular audio formats for easy playback.
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  • 90X faster conversion speed than any conventional converters.
  • Toolbox with additional functions like Screen Recorder, VR Converter, GIF Maker, Fixing Media Metadata, and more.
  • Supported OS: Windows 10/8/7/XP/Vista, macOS 11 Big Sur, 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7.

How to reduce MKV size without any quality loss.

Want to try Wondershare UniConverter (originally Wondershare Video Converter Ultimate) out? Just follow the steps below to compress MKV size in a few clicks.

Step 1 Import original MKV file.

After you have downloaded and installed Wondershare UniConverter on your PC/Mac, you just need to open it, and then go to the Video Compressor feature from the left-side panel at the main interface.

open MKV video compression tool

You can add an MKV by tapping on the + icon. You can add only one file each time. If you're looking for batch compression, then move to know How to Compress QuickTime Videos in Batch with Wondershare UniConverter >>.

add a mkv file into video compress tool

Step 2 Reduce MKV size.

Click on the settings icon, and a new pop-up window will open. After that, you can see the video's basic information and compression settings. Move the progress bar to adjust file size, format, resolution, quality, and bit rate easily. Click the Preview button to check your changes.

adjust MKV video compression

Step 3 Export compressed MKV video.

After you are done with all the settings, click on the Compress button to start the process of conversion. Your MKV video will be compressed soon with full quality output.

Start compressing a MKV video

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Kayla Morrison

Kayla Morrison

staff Editor

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