Queue MKV files
Choose one or more .mkv videos up to 100 MB each. Each queue row keeps a playable source preview.
Free online MKV to MP4 converter
Turn MKV videos into shareable MP4 files.
Add one or more MKV files, create new H.264 MP4 copies with AAC audio when the source has audio, then preview and download every completed result.
- Files not stored
- Queue MKV files
- 100 MB each
Processed by our self-hosted conversion engine
Supported files
MKV in. MP4 out.
MKVMP4
Add MKV video files up to 100 MB each. Fileverses creates a new MP4 result with this route’s documented conversion profile; review the completed download before using it elsewhere.
How it works
One queue. A new MP4 file.
Create MP4 copies
Start the queue to encode each readable source as an MP4 with H.264 video and AAC audio when the source includes audio.
Check each download
Review the completed preview, then download the separately named MP4 result for that queue item.
Limits and quality
A new MP4 file, with source-specific trade-offs.
The result is a newly encoded H.264 MP4 with AAC audio when audio is present. It is not a container-only remux of the original MKV.
Convert MKV nowMKV sources only
This route accepts non-empty .mkv files up to 100 MB each. The selected source needs to be readable by the host FFmpeg installation.
Fresh video and audio encode
The result is a newly encoded H.264 MP4 with AAC audio when audio is present. It is not a container-only remux of the original MKV.
First streams, no editor
The profile uses the first video stream and optional first audio stream. It does not select subtitles or alternate tracks, trim clips, resize video, or expose bitrate controls.
MKV to MP4 FAQ
Questions, answered.
What MKV files can I add?+−
This converter accepts non-empty .mkv files up to 100 MB each. FFmpeg must also be able to read the selected video for conversion to work.
What does the converted MP4 contain?+−
A successful result is an MP4 container with newly encoded H.264 video. If the selected source has audio, the result includes a newly encoded AAC audio track.
Does MKV to MP4 preserve every stream?+−
No. This implementation uses the first video stream and an optional first audio stream. It does not promise subtitle, attachment, metadata, chapter, alternate-track, or original-codec preservation.
Can I convert several MKV files at once?+−
Yes. Add multiple MKV files to the queue. The browser submits jobs sequentially, and every successful row has its own result preview and download button.
Will the MP4 be smaller or look identical?+−
Not necessarily. The H.264 and AAC encode creates a new compressed file, so visual detail and size vary with the source. Review the completed MP4 before using it.
Can I choose subtitles, trim, or change resolution?+−
No. This route has no editing, stream-selection, resizing, subtitle, quality, or bitrate controls.
Are source and output files retained?+−
Files are written to a temporary server directory only while each conversion runs. The source and generated output are removed after it finishes or fails.