Convert MKV to MP4
Convert MKV to MP4 online for free. Simply drop your MKV files below to convert them to MP4 in seconds.
- Free Converter
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Add files
Drop files anywhere on the page or paste them with Ctrl+V / ⌘+V
How to convert MKV to MP4?
Add MKV files
Drag and drop files onto the page or click the upload area. You can add several files at once.
Choose MP4 and settings
Pick the target format and, if needed, adjust quality, size and other options.
Download the result
Conversion runs right in your browser. Download files one by one or all at once as a ZIP archive.
Converting MKV to MP4: what to know
MKV is a flexible container often used for movies and TV series. TVs, iPhones, video editors and social networks handle MP4 better, so MKV is converted to it.
If the video and audio inside the MKV fit MP4, for example H.264 and AAC, the tracks are copied without re-encoding: fast and with no quality loss. Otherwise the video is re-encoded, which takes longer. If the result doesn't play on your TV, choose the H.264 codec in the settings.
Subtitles can be saved as a separate file: convert the MKV to SRT, and the text subtitles are extracted right from the video.
MKV or MP4: which to choose?
MKV (Matroska Video)
MKV is a flexible container that holds any codecs, several audio tracks and subtitles.
Best for films and series with several audio tracks and subtitles.
MP4 (MPEG-4 Part 14)
MP4 is the most compatible video format: it plays on phones, TVs, browsers and social networks.
Best for publishing and sending videos - maximum compatibility at a reasonable size.
What happens when converting MKV to MP4
If the codecs inside MKV are supported by MP4, the tracks are copied without re-encoding - quickly and without quality loss. Otherwise the video is re-encoded with the codec, bitrate, resolution and frame rate you choose.
You can also trim the video, rotate or flip it and remove the sound.
MKV files up to 2 GB are supported; the actual limit also depends on the free memory of your device.
MKV and MP4 compared
Convert MKV to other formats
Convert other formats to MP4
What else you can do with MKV
Frequently asked questions
How do I convert MKV to MP4?
Add MKV files above - MP4 is already selected as the target format. Adjust the settings if needed, start the conversion and download the MP4 files.
Can I change the MP4 quality?
Yes. Set the quality from 1 to 100 in the file settings: the lower the value, the smaller the file.
How do I save the subtitles from an MKV?
Choose SRT, VTT or ASS as the target for the MKV, and the text subtitles are extracted into a separate file.