MKV to M2TS Converter

What happens when you convert MKV to M2TS

• If the video inside the MKV is already H.264, the tool first copies the streams straight into the M2TS. That takes seconds and loses nothing.
• If a copy is not possible, it re-encodes to H.264 video with Dolby Digital (AC-3) audio at 48 kHz, in a transport stream with the 192-byte packets of AVCHD and Blu-ray, which is slow in a browser: expect several times the video's length for HD footage, less at lower resolutions.
• The M2TS is a single video file like the ones on a Blu-ray disc; it plays in VLC, on smart TVs and in video editors, but it is not a disc image or the folder structure of a Blu-ray.

How to convert MKV to M2TS online

1. Press "Choose MKV files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
2. Adjust the settings if you need to: resolution and quality control the size of the result. The defaults suit most people.
3. Press "Convert to M2TS". The first audio or video conversion downloads the converter engine, about 32 MB, which your browser then keeps for next time.
4. Save each M2TS with its download button. Close the tab and every trace of the files is gone from memory.

Why convert MKV to M2TS?

MKV files usually come from films and TV rips, OBS recordings and anime releases. People convert them to M2TS because M2TS is the file type of Blu-ray video, which smart TVs, media players and Blu-ray tools read.

In short, MKV is good at what it was made for, and M2TS is the more practical choice when the file has to play, upload or edit somewhere else. Chrome and Edge play many MKV files; Safari and iPhones do not, while M2TS does not play in browsers; plays in VLC.

How to convert MKV to M2TS on Windows, Mac, iPhone and Android

On Windows

Open this page in Chrome, Edge or Firefox, drag your MKV files in from File Explorer, and press Convert. Each M2TS is saved to your Downloads folder. If you prefer a desktop program, VLC can also convert MKV to M2TS: choose Media, then Convert / Save.

On a Mac

Safari, Chrome and Firefox all work. Drag the MKV files from Finder onto the drop zone and the M2TS files land in Downloads.

On iPhone and iPad

Open the page in Safari and tap Choose MKV files. You can pick from Photos or from the Files app. The converted M2TS appears in Files, in the Downloads folder; to put it in your photo library, open it there, tap Share and choose Save Video.

On Android

Open the page in Chrome, tap Choose MKV files and pick them from Files or your gallery. The M2TS is saved to the Download folder, where any file manager can find it. Keep the screen on while a long video converts, because Android may pause a tab in the background.

Best settings for MKV to M2TS

Leave Resolution on Keep original and Quality on Standard if the video only needs to change container: that is what lets the tool copy the H.264 stream straight into the M2TS, which is fast and loses nothing.

If the file is too big, change either setting and the video is re-encoded with H.264. Quality uses the CRF scale: High is 20, Standard 23 and Smaller file 28. As a rule of thumb each step of about 6 on that scale halves or doubles the size. Dropping from 1080p to 720p usually saves more than lowering the quality, and it also makes the conversion much faster.

MKV vs M2TS: the differences

About MKV and M2TS files

What is an MKV file?

MKV can hold unlimited audio tracks, subtitle tracks and chapters in one file, which is why film rips use it. OBS offers MKV recording because a crash part way through does not corrupt the whole file.

What is an M2TS file?

M2TS is the file type inside a Blu-ray's BDMV folder, and AVCHD cameras use it on the computer side. Protected Blu-ray discs will not convert.

MKV to M2TS not working? Common problems

• The conversion is slow. Audio and container changes take seconds, but re-encoding video runs on your own processor. Lower the resolution to 720p, close other tabs, and keep the device plugged in.
• The tab stops or reloads on a very large file. Browsers limit how much memory one tab can use, around 2 GB and less on phones. Split long recordings or convert them on a computer.
• The M2TS will not play on an old device. Try the other formats offered for MKV, or choose 720p, which older players handle more reliably.

Convert MKV to M2TS with ffmpeg

This converter runs ffmpeg inside your browser. If you would rather use the ffmpeg command line on your own computer, this command produces an equivalent M2TS with the same kind of settings:

ffmpeg -i input.mkv -c:v libx264 -crf 23 -preset veryfast -c:a ac3 -b:a 192k -ar 48000 -f mpegts -mpegts_m2ts_mode 1 output.m2ts

Replace input.mkv with the name of your file. For a whole folder of MKV files, run the command in a loop, or drop them all on the converter above, which processes them one after another.