Merge MKV Online - Free
Join several MKV files into one, and download it as MKV again. Free, in your browser.
- Free to start
- In your browser
- Up to 1GB
Merge MKV in 3 steps
Upload your MKV
Drag and drop the MKV file, or click to browse. Anything under 1GB.
Add the other clips
Add the rest of the files. They play in the order you add them.
Merge and download
The output is already set to MKV. Create a free account to download it, or keep editing in REQO.
Merging MKV files into one MKV
MKV (Matroska) is an open container that can hold any codec plus unlimited audio tracks, subtitle tracks and chapters. That flexibility makes it great for archives and useless for sharing.
The output format is set to MKV before you start, so what you download is the same kind of file you uploaded: nothing downstream that expects an MKV has to be told about a new format. If you would rather have something that plays everywhere, switch the output to MP4 in the panel.
Container
Typical codecs
Plays on
File size
| Feature | MKV |
|---|---|
| Container | Matroska |
| Typical codecs | Almost anything: H.264, HEVC, AV1, VP9 |
| Plays on | VLC and desktop players; rarely anywhere else |
| File size | Depends entirely on the codec inside |
Before you merge an MKV
An MKV often holds several audio languages and subtitle tracks. Converting renders one video and one audio track, so extra languages and embedded subtitles are not carried over; add captions in the editor instead.
Browsers, iPhones and most upload forms do not accept MKV, which is why a file that plays in VLC still needs converting before it can be shared.
merge mkv: questions
Will it stay an MKV?
Yes. The output is pre-set to MKV, so the merged file downloads as MKV. You can change it to MP4 or another format in the panel before exporting.
Does merging an MKV lose quality?
The part you keep is re-encoded once at a high quality target, so it is not bit-for-bit identical, but it is indistinguishable at normal playback. Editing the same file over and over will eventually show, so keep your original.
Is merging MKV free?
Yes. Merge and preview free, and a free account downloads the result. Free exports and share pages include a small REQO badge. Go Pro to remove it.
Other presets
Everything else you can do here.
All merge videos presets
Crop for a platform
Crop to a ratio
Resize to a resolution
Compress for a destination
Compress a format
Rotate or flip
Change the frame rate
Extract audio from a format
Subtitles in another language
Convert a caption file
Need more than merge mkv?
REQO is a full browser video editor: record, edit by transcript, caption and export.