MKV to MP4 Converter
Export a Matroska video clip as an MP4 with H.264 video and optional AAC audio.
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MKV
Max file size: 100 MiB
Share an MP4 clip
Re-encode the first video track to H.264 for MP4 playback, with the first audio track converted to AAC.
Control size and quality
Set the maximum dimension from 480 to 1920 pixels and choose a quality preset.
Trim and mute
Use the start and duration controls to export a short selection, with an option to remove audio.
How to convert MKV to MP4
- 1
Choose an MKV video file.
- 2
Set the start time and duration, then choose output dimensions, quality and whether to keep the audio.
- 3
Convert and download the MP4.
What people use this tool for
- Prepare a short screen recording for playback in a browser.
- Save a muted clip from a demonstration.
- Create a smaller-dimension MP4 for sharing.
Frequently Asked Questions
Which streams are included in the MP4?
The converter takes the first playable video track and, unless muted, the first audio track. Additional tracks, attachments, subtitles, metadata and chapters are excluded.
Does the converter keep the original resolution?
Choose a maximum dimension at least as large as the source to preserve its size within the available presets. Dimensions are fitted to the longer edge and rounded to even numbers for H.264.
Is the export lossless?
The video is encoded as H.264 with square pixels and a maximum of 30 frames per second. Higher quality retains more visual detail and may produce a larger file.
Can I convert a long MKV movie?
The default upload limit is 100 MiB and sources can be up to 30 minutes long. Each export is limited to five minutes and 80 MiB. For a longer source within those limits, choose a short excerpt.
Can I convert a silent MKV?
Yes. A source with a playable video track can be exported without audio. Choose Mute to discard an existing audio track.