How to Convert MKV Videos to MP4
Here's how to convert MKV (Matroska) videos to MP4. With videoconverter.tokyo, there's nothing to install — you can convert right from your web browser.
What is MKV?
MKV (Matroska Video) is a flexible video container format that can bundle multiple video, audio, and subtitle tracks into a single file. It's often used for files that include several audio tracks or subtitles.
Why convert to MP4?
Many playback devices and apps don't support MKV, and smartphones and social media often expect MP4. Converting to MP4 makes the video playable and usable in more places.
What happens when you convert with videoconverter.tokyo
When you upload an MKV file to videoconverter.tokyo, the video is converted to H.264 and the audio to AAC, then output as MP4. You can trim and resize the video at the same time as converting it.
Important note on multiple audio tracks and subtitles
If the original MKV has multiple audio tracks, only the first is kept in the converted MP4. Subtitle tracks are not carried over either. If you need every audio track and subtitle preserved, videoconverter.tokyo is not suitable.
Steps to convert with videoconverter.tokyo
- Select your MKV file.
- If needed, set a trim range or resize the video.
- Click "Create Edited Video" and download the MP4 once it's done.
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Frequently Asked Questions
Yes. You can upload an MKV file directly, and it will be output as MP4 (H.264/AAC).
You can upload it, but the converted MP4 will only contain the first audio track — any additional tracks are dropped. We confirmed this behavior by actually converting an MKV file with 2 audio tracks.
No. Subtitle tracks in the MKV are not included in the converted MP4. We confirmed this by converting an MKV file that included a subtitle track.
Yes. When converting MKV to MP4, you can trim and resize the video in the same step.
When signed in, up to 4GB per video with no daily conversion limit; without signing in, up to 500MB and 3 conversions per day (no limit on video length).
The uploaded MKV file and the converted MP4 file are automatically deleted within about an hour of being created.