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MKV File Joiner: How to Merge Two or More MKV Files into One

MKV is a container format which can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. Therefore some people always choose MKV as output when they need to digitize their movie discs. But after finish ripping, they may also need to merge a few MKV files into one. Some people are wondering if it is possible to merge MKV files with free HandBrake. Actually, HandBrake cannot merge videos. But don't worry. Combining MKV files is an easy job. Here we'll introduce 4 MKV file joiners. Besides desktop based applications, we'll also introduce online method to do this job.

Part 1. How to Merge MKV Files on Windows and Mac without Quality Loss

To combine two or more MKV files into one on Windows (10) or Mac, you can try HD Video Converter Deluxe. This tool can join MKV files together while preserving the original image and audio quality. Besides merging MKV files, it can also merge MP4, MOV, AVCHD, FLV, WebM, MTS, and more video formats.

Actually, HD Video Converter Deluxe is more than a video joiner. It can also do the following things:

  • Convert videos to other formats (such as MKV to MP4) to fit for PC, Mac, iPhone, Android, TV, Adobe Premiere, YouTube, etc.
  • Compress videos to play, upload, or send without errors.
  • Make basic editing, like trimming, cropping, and adding subtitles.

Now, let's click the download button below to download and install this MKV merging software on our computer and follow the steps below to combine MKV files.

Step 1. Launch HD Video Converter Deluxe and click the + Video button to load the MKV files you need to join together. Alternatively, you can simply drag and drop them into the window.

Step 2. On the Output Profile, choose a format for the merged file. You can choose MKV or a different format. There are more than 420 output profiles to choose. To keep using MKV, just scroll down to PC General Video and choose Matroska Video.

Merge MKV files
Merge MKV files

Step 3. Make sure the MKV files are placed in desired order and check Merge. You can also check Auto Copy. By doing this, it will join MKV files without re-encoding when same codec is detected.

Step 4. Click the RUN button to begin combining MKV files into one.

Part 2. How to Merge MKV Files with Free MKVToolNix

In our previous article, we have illustrated how to add subtitles to MKV with MKVToolNix. In fact, we can also merge MKV files with MKVToolNix. MKVToolNix is a small collection of tools including mkvmerge, mkvinfo, mkvextract, mkvpropedit and mmg, with which we can create, split, edit, mux, demux, merge, extract or inspect Matroska files.

Now, let's download and install MKVToolNix and start learning how to merge MKV files on Windows, macOS, and Linux.

Step 1. Open MKVToolNix and import the first MKV video by dragging and dropping it under Source files or by clicking the Add source files button at the bottom of the window.

Step 2. Drag and drop other MKV files you want to combine with the MKV video you just imported. Now, you will see a dialogue asking what you want to do with the files you've dragged & dropped or copied & pasted here. Here, you should check Append to an existing source file.

Merge MKV files free with MKVToolNix
Merge MKV files with MKVToolNix

Note: All the MKV files need to have the same codecs for them to be joined.

Step 3. After you have loaded all the MKV files you want to merge, go to check the box of Tracks, chapters and tags and make sure there are only two codecs – one for the video and the other for the audio. It won’t work if there is an extra video or audio codecs.

Step 4. Set the destination file.

Step 5. Click the Start multiplexing button and wait for the merging to complete.

Part 3. How to Merge MKV Files for Free with VLC

If you have VLC installed on your computer, you don't need to install anything to combine MKV files. VLC is not just a media player. It can also merge videos in MKV and other formats in a few steps.

Step 1. Run VLC, click Media, and choose Open Multiple Files.

Step 2. On Open Media window, click + Add to select the MKV files you want to merge. Then, click the drop-down menu beside Play and choose Convert.

Step 3. On Convert window, choose a profile, destination file, check Append '-converted' to filename, and click Start. Then, VLC will begin processing your videos and export a new file with your MKV files merged together.

Merge MKV files free with VLC
Merge MKV files with VLC

Part 4. How to Merge MKV Files Online for Free

If you don't want to install a program to merge MKV files, you can finish this online. There are many online video mergers such as Clideo and VEED.IO. However, online tool isn't a good choice if you have a bad internet connection and if you have large-sized files to process. Such kind of tool always has file size limit for free accounts. For example, Cideo doesn't allow free users to upload files larger than 500MB and VEED.IO even doesn't allow files bigger than 250MB. Certainly, you can upgrade to a paid plan to break the limits. Now, let's show you how to merge MKV files online. Here we'll take Clideo as an example.

Step 1. Open your web browser and visit Clideo MKV joiner page.

Step 2. Click the blue Choose files button to load the MKV files you want to merge. Clideo also allows you to add source files from Google Drive and Dropbox. After you choose files to open, Clideo will start uploading and preprocessing. How long it will take for uploading depends on your file size and network connection. Once done, it will direct you to the operation interface.

Step 3. Click Add more videos or Add more files if you have other MKV files you want to merge.

Step 4. Reorder the MKV files by dragging and dropping on the timeline.

Step 5. Choose output format and set aspect ratio based on your own needs.

Step 6. Click Export button to output the merged file.

Merge MKV files free online
Merge MKV files online free

Well, above are the most popular ways to merge MKV files. If you are looking for a way to merge large MKV files quickly and losslessly, HD Video Converter Deluxe is the way to go.


author - Kistent Waung

Kistent Waung twitter icon

Graduated from Nanyang Technological University, Singapore, she employs herself in IT related content creation (since 2013) and happens to perfectly combine her major (computer & science) and her gusto (writing). She's seasoned at offering video audio conversion workarounds and always passionate about new trends, from hot HEVC, 4K to the new AV1 codec.

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