As a format for streaming high definition videos, MKV now has been used widely online and offline, especially for movies. This file format supports subtitles which make it be more popular in saving movie files. But not all MKV videos have subtitles of course. So if you wanna add subtitles to MKV movies, you are in need of a professional tool like UniConverter for help. This Mac app enables you to convert videos in all popular formats and loading subtitles to MKV, AVI, MP4 or other files. Just read this article to learn more details.

Most Effective Tool to Add Subtitles to MKV Videos

Generally speaking, not all file formats support subtitles like MKV does. But with UniConverter, you can add subtitles to any video, or convert other video formats to MKV with subtitles, even convert MKV to MP4, MOV and more with subtitles for playing on your iPhone, iPad, Android tablets etc. All these tasks can be finished within 3 or 4 steps.

User Guide to Add Subtitles to MKV Videos with iSkysoft

Step 1. Add MKV files to the Converter

Launch the app, and add your videos to the program: directly drag & drop your MKV videos to the UniConverter or go to "Add Files" button to browse your videos. The MKV Converter supports you to merge several video files into one and save as MKV file: add one video to the Converter, drag others to the video's info bar on the main interface, or choose "Merge all videos into one".

Step 2. Add subtitle to MKV files

There are three methods for you to add subtitles to MKV videos:
1. The program provides a subtitle box on the video info bar. Click it to open a drop down list where you can choose "Load Subtitle";
2. Head to "Edit" menu and choose "Subtitle" for the task;
3. Click the edit pen icon on the video info bar, select "Subtitle" tab and click the subtitle box to load your subtitles to MKV files.

Step 3. Select output format

After that, go back to the main interface. The default output format is iPhone MP4. So if you wanna get a MKV video, you need click the format icon on the video info bar and choose MKV from the format list. By the way, the compatible subtitle file formats are srt, ass and ssa.

Step 4. Start the MKV subtitles task

Down to the right bottom of the main interface of the Video Converter for Mac, click on "Convert" to start the conversion.