Video Conversion

Convert MP4 to MKV

Convert .mp4 files to .mkv format locally on your desktop. Fast, private, completely offline. Nothing leaves your machine.

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.mp4
Input
LOCAL
.mkv
Output

How to convert MP4 to MKV

1

Open dotformat

Launch the app and drag your .mp4 file into the window.

2

Select MKV

Choose MKV from the format picker. It'll be auto-suggested for video files.

3

Done

Click convert and your .mkv file is saved instantly.

About video conversion

Video transcoding with FFmpeg. Hardware-accelerated encoding for fast processing on your machine.

All video conversions run entirely on your device. No files are uploaded. Your data stays private.

Key details

Input format: .mp4 (MP4)

Output format: .mkv (MKV)

Category: Video

Processing: 100% local

File size limit: None

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