About this tool
Convert a Matroska MKV file under 2 GB into an H.264 MP4 with AAC audio. Only the first video and first audio track are included; subtitles, attachments and extra tracks are omitted. Odd dimensions are rounded up. HDR and transparency are not preserved. The video engine downloads about 30 MB on first use; the file stays local.
How to use MKV to MP4
- Choose the MKV file you want to convert.
- Select Convert to MP4 and wait for re-encoding.
- Download the MP4 and check the selected picture and audio.
Frequently asked questions
Will subtitles be included?
No. Subtitle tracks and attached fonts are omitted. Burn subtitles into the video with your editing software if they are required.
Which audio language is selected?
The first audio track in the file is used. This tool does not provide language or track selection.
Can every MKV be converted?
No. MKV can contain codecs that the browser engine cannot decode. Large or high-resolution files may also exceed available memory.