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How to Add Subtitles to MKV Videos with a Few Clicks

Author by Annie

Updated on Aug 18, 2023

An .mkv movie file can hold multiple subtitle tracks. If you want to know how to add subtitles to MKV movies, don't miss out on this post. Below, I will elaborate on how to add subtitles to MKV using a Windows-based free subtitle embedding tool:

The other day, my friend sent me an MKV movie file and asked me if I have any idea how to add English subtitles to this foreign movie. It is as easy as pie for me. I added the subtitle to this MKV movie immediately and sent it back to him. Then, I told him the way to add subtitles to MKV and other movies. If you have the same needs, I would like to share two handy ways to free add SRT to MKV and other movies without any trouble.

You can hardcode subtitles or add soft subtitles to MKV. But before that, you need to download the subtitle files from subtitle sites like Subscene and OpenSubtitles. There are many common subtitle formats, such as SRT, ASS, SSA, IDX, SUB, etc., and among all the subtitle formats, SRT is the most frequently-used one. So, I will show you how to add SRT to MKV.

Method 1. Add Subtitles to MKV Permanently with a Handy Desktop Program

WonderFox Free HD Video Converter Factory is a good and free program for adding subtitles to MKV. It can quickly add SRT to MKV through hardcoding or softcoding. As the cherry on top, it will add subtitles to videos without watermark. With the same program, you can also add subtitles to other video files as well as remove subtitles. The whole process is only a couple of clicks.


Now, download and installdownload and install this freeware, and learn how to add subtitles to MKV.

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How to Embed Subtitles to MKV with WonderFox Free HD Video Converter Factory

Import the MKV Files to the Software

Step 1. Import MKV Files to the Software

To add subtitles to MKV, first, launchlaunch the subtitle adding tool and open the Converter workplace. Then, click the "Add Files" button to import your MKV file into it. Or you can directly drag and drop MKV files to the main interface.

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Merge SRT with MKV Files

Step 2. Merge SRT Subtitle Files with MKV Files

After MKV videos are imported, you'll see a tool bar at the bottom of each video, the first of which is the Subtitle Option. Then click the "+" button to browse your computer and choose the needed subtitle file. Just follow the above steps to add subtitles to other MKV files you have imported. When you're all set, click the RUN button at the bottom to initiate the process of embedding subtitles to MKV.

Note: This converter supports .ass and .srt subtitle formats as inputs and both hard and soft outputs.

WonderFox Free HD Video Converter Factory allows you to convert videos/audio to more than 500 formats and devices. For example, you can convert MP4 to MKV, convert AVI to MKV, and etc. If you need to convert the MKV movies to other formats, just click the "Click to change output format" area and choose an output format/device as you need.

Method 2. Merge SRT with MKV with Online Tools

How to Hardcode Subtitles MKV OnlineHow to Hardcode Subtitles MKV Online

Some people may prefer to add subtitles to MKV online so they don't have to install any software. However, online tools have some flaws, such as the limits on video size and video formats, slow and unstable upload & download process, too many pop-ups and ads, all of which are what you need to be aware of. Here, I will take one online tool as an example to show you the ropes.

Step 1. Go to https://www.kapwing.com/subtitles and upload an MKV file.

Step 2. Select SRT file to upload > click the "Add Subtitles" button > after done, download the MKV file with subtitles.

Online vs Offline. Which One is the Best Tool for Adding Subtitles

Online tools usually have few video formats options to offer you, and the whole prcess may be too long too tolerate as upload nad download large MKV files cost you plenty of time. So if you need to add subtitles to more videos efficiently, WonderFox Free HD Video Converter Factory is the perfect choice. In addition to adding subtitles to MKV and other videos, the software is so versatile that it enables you to convert videos to more other formats, even to audio, such as convert MP4 to WAV, convert WMV to MP4, etc., and it excels in downloading videos and audio from over 500 websites, for example, it can download YouTube playlists, download Facebook videos, download Instagram videos, etc. You are recommended to download the software to try it out.

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WonderFox HD Video Converter Factory Pro is the upgraded version of Free HD Video Converter Factory. In addition to the basic downloading, editing and conversion function, it can convert 4K & HD videos, letting you enjoy higher definition videos. Also, its batch processing, 50X speedup conversion, lossless compression, and built-in ringtone studio make it a must-have video/audio converter and downloader.

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