How to merge srt, idx or sub subtitles with MKV in seconds

This tutorial will show you step by step how to merge SRT, IDX, and SUB subtitles with an MKV movie using the free program MKVToolNix.

MKVToolNix is a small program that allows you to combine SRT, IDX, and SUB subtitle files with MKV video files in seconds.

With this free tool, you can also merge multiple subtitle files with an MKV video file.

This tool is made for Windows and Mac OS X computers, and you can also download and use the portable version on a USB flash drive or external hard drive.

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How to merge subtitles with MKV movies using MKVToolNix

This will permanently embed (hardcode) the subtitles into your MKV movie.

1. Make sure that the subtitle file is in the same folder as the MKV video file.

2. The subtitle file must have the same filename as the MKV video file.

Example:

3. Download MKVToolNix here.

MKVToolNix is a set of free tools to create, split, edit, mux, demux, merge, extract, and inspect MKV video files.

You can install MKVToolNix on your computer, or you can use the portable version.

4. Install MKVToolNix on your computer.

Or if you've downloaded the portable version, then you can skip this step.

5. Open MKVToolNix.

6. Click on the + Add source files button at the bottom.

add source files and start multiplexing buttons in MKVToolNix

7. Go to the location on your computer where the MKV and subtitle file(s) are.

8. Select the MKV file and subtitle file(s) (.srt, .sub or .idx) and click on Open.

Open MKV File and Subtitle File in MKVToolNix

9. At Destination file (located at the bottom), you can view and change the location on your computer where MKVToolNix will save the new MKV video file.

10. Click on the Start multiplexing button at the bottom.

add source files and start multiplexing buttons in MKVToolNix

MKVToolNix will now merge the SRT or IDX or SUB subtitles with the MKV video file in a few seconds.


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