How to add subtitles to a movie or a video so that a movie displaying in a foreign language makes sense to you? Suppose there is a movie in the format of MKV, how to add subtitles to an MKV file? Here I will introduce some powerful MKV subtitle editors, helping you add subtitles to MKV free and easily.

1. UniFab Video Converter

add subtitles to mkv

UniFab Video Converter

UniFab Converter not only helps you add subtitles to MKV, but also allows to customize your MKV file by cropping, trimming it, or adjusting its playback speed, etc.

Key Features:

  • Add external sutitiles or watermarks into your MKV/MP4 videos
  • Support to convert any video to 1000+ video and audio formats
  • Convert or compress videos to any video format without quality loss
  • Offer customized settings and a built-in video editor to make your video 
  • Convert multiple videos with the Batch Mode
Step 1

Install and launch the UniFab Video Converter on your device first.

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Step 2

Select the mkv video/file you want to add subtitles, and then add it into UniFab. 

add subtitles to mkv

Step 3

Choose the 'T' icon, select 'Add External Subtitle', then, click the Start button to begin the process.

add subtitles to mkv

2. ToolKit

Toolkit is a one-click solution to add subtitles to MKV. It is very easy to learn how to add subtitles to an MKV file with this free software. Let’s witness how powerful it is.

(1) Download and install UniFab Video Converter Pro on Windows

After launching this MKV subtitle editor, click Render Subtitles under Subtitle Tools. Then you will be navigated to import your MKV video. This is the best program to add subtitles to video.

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Add Subtitles to MKV

(2) Add subtitles to MKV and edit MKV subtitles

After importing MKV video, you will be asked to insert subtitles and set its mode: Direct render to video or Remux into file. Then you can customize the language, charset and any other part listed by this "add subtitle to video software".

Add Subtitles to Video

(3) Start to add subtitles to MKV

Set an output directory and click the button Start. DVDFab Toolkit is subtitle editor freeware. How to add subtitles to MKV with it?Follow the steps above and you will make it.

3. MKVMerge GUI

How to add subtitles to MKV? If you want to add subtitles to MKV movies Windows or Linux, choose MKVMerge GUI, part of the MKVToolnix package. But framkly speaking, this MKV subtitle editor is not that easy to use. Choose the "Add" button for the first time to load your MKV video. Then, tap "Add" second time to add subtitles to MKV. Select your mother tonuge by clicking "General Track Options". At last, start Muxing and add subtitles to video.

how to add subtitles to mkv

4. WonderShare UniConverter

How to add subtitles to a movie? This MKV subtitle editor is compatible with Windows and Mac. You can use it to add subtitles to MKV following such steps. First, import MKV video by dropping it or click the button “Add Files”. Second, how to use SRT files with MKV? Add subtitles to MKV by clicking the subtitles you have prepared in a format of SRT, SSA, or AAS. Third, set the MKV output format and start to add subtitles to MKV using WonderShare UniConverter. Compared with DVDFab Video Converter, the interface of this software is not that beautiful,

How to Add Subtitles

5. Apowersoft Video Converter

How to add subtitles to MKV? Apowersoft Video Converter is a Mac MKV subtitle editor. You can use it to add subtitles of SSA, STR and ASS. When you add subtitles to video of MKV format using this program, get it launched in your machine, and load your file by clicking “Add Files”. Tap the button of “Subtitle” and add subtitles to video. After it is finished, click the option of “Convert” and output the file as MKV format.

Add Subtitles to MKV

6. Conclusion

Have you learned how to add subtitles to MKV with any of the top 5 best MKV subtitle editors? UniFab Video Converter is the most user-friendly and easy-to-use software. Hope you can find the best way to add subtitles to video, including but not limited to MKV file.